A Comprehensive Analysis of the Versatility of an Ice Pick: Useful for Culinary Experts as well as Mountaineers

This blog, in conjunction with other posts, looks into the various applications of the unique tool, ice pick, across a plethora of industries. Mixers and mountaineers have been employing ice picks to perform various tasks that require a combination of precision and functionality. A detailed overview of the concept and design of an ice pick along with its significance in history will be performed and its contemporary application will also be evaluated. Further, important factors to consider when choosing an ice pick will be discussed, these include the manufacturing material of the handle, the balance, and length of the handle. Finally, we will extend the definition of ‘ice-pick’ beyond the traditional definitions and instead substitute it for culinary tools with which food can be prepared. The application of ice picks has caught on greatly by the mixology community as they are widely used in the crafting of visually appealing cocktails, however, safety practices still need to applied when using such tools. All in all, a closer look into the versatility of ice picks will be performed alongside all of its benefits.

What is an Ice Pick and How is it Used?

What is an Ice Pick and How is it Used?

An ice pick is a tool built for hand usage and has a sharp tip that can be used to break ice that has been formed into large blocks, a precise tool that can be used to shape ice after it has been chipped away or to simply sculpt/cut it. Ice picks are commonly employed in a myriad of fields such as industrial, mixology, and culinary work. The ice pick makes it easy to create carved sculptures by breaking down large blocks of ice, making ice cubes, and crushing ice as it is able to accurately chisel and manipulate ice which is a precision task. Ice picks are easy to hold as they come with a handle designed to fit in the user’s hand, serving its purpose quite well. Ice picks get the job done well in a variety of industries, allowing the user to work with ice without any difficulty while ensuring accurate manipulation and control.

Understanding the Basic Tool Design

Ice picks have a few important areas that help with the functions and use cases for the tool. Here are some technical details and specifications to have a look at:

Material Composition: The ice picks are created or built with materials such as stainless steel, tungsten and high carbon steel. These materials offer the tool structure and prolong its useful life.

Blade shape and size: Ice picks are made with blades of different shape and size depending on the need. These includes pointed, chisel and flat, all used for either breaking , slicing or shaping ice blocks respectively. Moreover, these blades can also vary in length and one can choose from a few inches to several of them depending on what they wish to use it for.

Construction of handle: The handle of an ice pick is extremely important as it allows for a firm grip and comfortable handling of the ice pick itself. They are typically made of wood, plastic or stainless steel. Each has its own set of problems as they are sturdy, have a strong grip or appealing aesthetics. Think about your needs and the types of tasks you perform while picking the handle material.

Safety features: The blade of the slicing knife can be covered and guarded during storage and transportation to avoid it from being misplaced and posing a danger to the user, some ice picks can have more safety features than this.

Grasping the intricacies involved in the technicalities coupled with the relevant data will help you engages in the selection of the best pick for ice that suits your needs. There are times when the need to an exact control is a must and as much need is to break ice or simple ice pick carving needs. If only you have an in-depth comprehension of the technical features then you can make a decision.

Ice Picking tool’s Role in History

It is essential to emphasize proper care and handling of your ice pick so that it can last long and still be functional. If you abide by these recommendations, chances of damage or accident when using any of your ice pickscan be minimized and their condition will be kept optimal:

  • Do Not Forget to clean after use: Do not forget to clean out your ice pick after every use; rinse it down with mild soap and warm water, be sure to remove any ice or grime that might be left on the pick or left on the handle to avoid the risks of corrosion.
  • Remove Moisture when Storing: After cleaning your ice pick, take proper precautions to ensure the pick does not remain for long in moist and damp conditions, as slow exposure might lead to rust on the metal blade which might increase the chances of the metal corroding over time.
  • Keep Away in a Safe Place: Look for a particular space to put away your ice pick that is dry and away from extreme temperatures. You may also want to consider a cover or sheath to guard against accidental injuries and help keep the pick sharp.
  • Sharpen as Needed: After some time , the point of the ice pick will become blunt from wear and tear. In such cases always sharpen the tools using a sharpening stone or file, but be sure to follow the honing instructions provided by the manufacturer.
  • Examine Before Use: Examine your ice pick for damage or wear before attempting to use it. In particular check the handle for cracks or loose parts, and the head to see if the pick is firmly fastened onto it.

You are able to ensure the longevity of ice picks and make good use of them considerably longer than they would normally last through proper maintenance and care. Always remember to treat your ice pick with care and follow the right procedures with them in order to avoid injury from accidents.

Interdisciplinary Applications

In regard to ice picks, their application is not limited to the cutting of ice only. These kinds of tools have a variety of uses in various sectors: Construction, mixology, food industry, or even rescue missions. Here are some common usage scenarios for ice picks across different sectors:

Food Industry: Ice picks are helpful implements in the kitchen, especially during food preparation. They may be utilized to cut through big ice blocks , while crafting fruit or vegetable garnishes, along with cracking open hard shells like coconuts.

Mixology: Moving on into the realm of mixology, Ice picks serve an important purpose. Bartenders use them to chip off and reshape ice cubes so they can use them for drinks in a more aesthetic way. Because ice picks allow mixologists to construct gorgeous ice sculptures, it is much easier to manufacture drinks than to prepare them.

Industrial Uses: Certain industrial settings also make use of ice picks. For instance, individuals in the construction sector may utilize ice picks to chip frozen surfaces or remove ice from machinery or other tools.

Recreational Activities: Ice picks are fundamental instruments for outdoor sports lovers during ice block climbing or mountaineering for instance. Such tools help maintain balance and pacing on icy surfaces as one can grip thumbtack on ice terrain.

Arts and Crafts: Ice picks also come in handy for people who engage in sculpting or masons, that is because ice picks are often applied to carve materials such as ice, foam or similar objects that require fine details and shapes to be produced.

How to Select the Right Ice Pick for Your Needs?

How to Select the Right Ice Pick for Your Needs?

Selecting Wooden over Stainless Steel Handles

Definitely, an ice pick is used as a kitchen tool. It uses the sharp edge at one end to break ice, chip food, puncture layers of fruit, vegetables or meat with the pointed end. But as always in a factory or kitchen, safety rules have to be complied with. Moreover, it is prudent to limit the use of ice picks intended for the kitchen only to the kitchen and not to other materials.

Liberty of Length and Grip Preference

More factors should determine the choice of an ice pick to be used in the kitchen for effective use reversibility. Here are some important things or data which your decision making process should pay attention to:

Length Preferences – The range of heights for ice picks is in the region of 6 – 8 inches. Greater length ranges of ice picks allow the users to reach and have leverage of these ice picks and are therefore appropriate for large pieces of ice or for big ingredients of any sort.

  • Grip Design: While choosing an ice pick, try to focus on its grip design. Some have the conventional wooden grip while other have a rubber or an combined ergonomic grip. Take into account your comfort and grip strength during selection of the right option.
  • Best Picks: Widely known manufacturers such as XYZ and ABC has ever increasing presence in the market with their ice picks which have sharp tips and heavy duty construction. Such brands can be trusted due to their reputation.
  • Safety Elements: Choose ice picks with additional safety elements such as blade guards and protective sheaths, as these usually help to reduce the chance of unintentional injuries when the ice pick is stored or handled.
  • Construction: Ice picks are usualy made from stainless steel or carbon steel however there are alternatives in the shape of plastic or aluminum alloy. When worried about rust resistance, then make sure you concentrate on stainless steel or alloy as the material and design for the items.
  • Care: To assure your ice pick lasts longer, the right maintenance is necessary. Look for options that are more a less easy to maintain, such as parts that are dishwasher safe or coatings that resist rust.

When picking an ice pick for the kitchen, keep in mind these features and data to guarantee it is both functional and safe during the preparation of food.

Can an Ice Pick Be Used as a Kitchen Tool?

Can an Ice Pick Be Used as a Kitchen Tool?

Uses of Ice Picks in Food Preparation

Pesonally, I do believe that ice picks are entertainment devices to use, however they can be used none the less but with extreme care instead. Providing leisure while seeing ice blocks get broken apart certainly is enjoyable, but the use ice picks are primarily used for food preparation as well.

Let’s go over the idea of an ice pick and the noted the benefits of using an ice pick in food.

Precision in Ingredients Preparation: Ice picks can be used for loosening frozen ingredients as well as making it easy to prepare a portion of meat or fish. It also prevents the embedding of chunks in berries and seafood.

Cocktail Decoration: One of the most creative Multi dimensional designs can be created for cocktails using ice picks. More ton detailing can be achieved than using regular ice tray molds.

Cracking Open Coconuts: For various foods apart from meat or fish coconut water contained within a coconut can be extracted via an ice pick as well, or even the sap covered within seafood.

Crafting Ice Sculptures: Most Professional chefs or even just individuals trained a little about ice sculpting require an ice dip as it helps with the detailing part in an ice sculpture or even ice in general.

An ice pick should only be used in the kitchen once the necessary precautions are taken. Ensure that the oven is unplugged from above, grip the handle firmly, and ensure that you are standing on stable ground.

Always put safety precautions first. When considering whether to use an ice pick in a kitchen, consider its applications as well as its limitations.

How to Cook with an Ice Pick in the Kitchen

Appropriate techniques should be followed when using an ice pick and only then will the desired outcome be achieved. Here are some points which should be kept in mind, along with some key data:

Caution: An ice pick is not a tool to be careless with. Always keep a grip of the tool during use, try not to stand on an unstable surface while using it, and most importantly be careful. This way accidents or injuries can be avoided.

Techniques to carving ice: Creating shapes with ice picking tools is everything about attention to detail, hand placement, and the accuracy with how the tool is used. First of all you need to aim at picking up only gentle touches hence gently apply pressure while scoring the ice’s edges.

Heating and Cooling Vignettes: While employing an ice pick, it is important to note how hot or cold the temperature is and the characteristics of the ice. As ice may easily slip off, ensure to use stable working conditions and wearing protective gloves may be beneficial for insulation purposes.

Ice Shaping Tools: Ice picks are useful tools for professional chefs and expert ice sculptors. They grant precise finishing touches, texture, and detail to ice sculptures improving its quality.

Caution must be exercised while employing an ice pick, as their inclusion in your kitchen toolkit may transform the style of food that you make. But using it conveys more techniques and methods making the food seem better.

Introducing Ice Pick: A New Crash

Over the years, mixology – a process of making splendid cocktails and enchaining their appearance – has acquired a massive recognition. Bartenders and mixologists have gladly adopted the ice pick as a tool in their profession. Therefore, here are three reasons why the ice pick has become a mixologist’s dream tool:

The ice pick enables the mixologists to shape and chisel the ice into proportions and forms such as ice cubes and spheres, which are usually tailor made for the drink. Such custom made ice shapes are perfect for cocktails not only because they look great but also make the cocktails chilled and minimizes the chances of cocktail dilution over a period of time.

The ice pick has also acquired significance in mixology owing to its link cast with Japanese ice design cutting and craft techniques. Taking a leaf from Japanese bartending practices, the mixologists utilize the ice pick to carve intricate designs such as light flowers or geometric figures on a block/sphere of ice. This deliberate attention to detail adds a new dimension to the cocktails, not just in how the cocktails look but also how the customers portray them.

Ice picks are multi-functional tools behind the bar. They’re very helpful in shrinking large ice blocks into smaller blocks to make it easier to have a steady supply of ice for multiple cocktails. Ice picks are also useful while chipping ice into exact pieces for various drinks or trying to get some crushed ice for crushed ice cocktails. Ice picks are incredibly useful tools for mixologists as well since they can assist in enabling detail thereby turning a cocktail cocktail into a work of art.

Mixologists are advocating the use of the ice pick as it goes a long way in enabling them to enhance and redefine the concepts of cocktail making. However this tool requires one to be extremely careful while handling it, safety should overstated. Proper instruction and Safety Compliance are crucial to a safe and exciting mixology experience, ensuring a solid cocktail treatment is achieved.

Why is the Ice Pick Popular in Mixology?

Why is the Ice Pick Popular in Mixology?

Creating Cocktail Art with the aid of Specific Ice Cube tools

In ice carving, ice wpicks are cherished because they serve the purpose of taking cut cubes of ice to be added to beverages and also make it easy to craft that trendy crushed ice type of cocktails. They are versatile, precise and perfect for the mixologist in search of that extra artistic flair to add to their work.

So, what is the fascination surrounding ice picks in the cocktail scene? Let’s delve deeper into the details and data and see what lies beneath the fascination level:

Better Ice Beverage Presentation: Ice spheres and ice slabs enthrall and demand respect within the troll industry. It is during the ice making process during which mixologists are able to blend creativity and science to create drinks that stand out and are unique. For elegant ice shards, ice picks are essential as they are interesting, unique and worth posting on Instagram as they will make an unforgettable expression to the clients’ jaw dropping with perfection ice pick cocktails.

Cocktails Dilution Analysis: Ice picks are literal mixologist tools as they are accurate. This means that mixologists use ice picks to dilute their cocktails to an extent. By varying the type and size of the ice pick to the type of liquor, mixologists strike a level where leaving the drink imbalance flavor mat solely meets their expectations.

Temperature Control : Ice picks allow mixologists to control the temperature of their cocktails more precisely. Different shapes and sizes of ice can be constructed to complement the specific needs of various cocktails and to enhance the user experience.

Texture and Mouthfeel : Ice picks allow mixologists to be daring and experiment with texture and mouthfeel. Drinks can be enhanced with unique ice shapes or with crushed ice, which improves the overall experience for consumers.

When it comes to treating mixology as an art form, ice picks are a necessity. They allow mixologists to construct unique cocktails and ensure that the resulting drink is of an exceptional standard. Ice picks, on the other hand, must be used with great caution and care. To create a positive and enjoyable mixology experience, sufficient training, knowledge of safe practices, and compliance with applicable practices in the industry are required.

An Understanding of Japanese Style and the Craftsmanship

In mixed drink preparation, ice picks serve as invaluable assets, enabling bartenders to augment their skills and provide patrons with unforgettable experiences. Bartenders are also able to make different types and presentations of ice with these tools which advance the overall captivating experience of cocktails even further. Nevertheless, safety should take precedence and ice picks should be managed with a reasonable degree of caution. Now, let’s outline some necessary safety issues and ice handling practices to help ensure a safe and fun mixology experience:

Do not exert too much pressure onto an ice pick while using it to avoid accidentally slippage or causing injuries.

Watch what your fingers do while holding the tool and also the striking area maintain a steady grip on the instrument.

Be careful and cautious regarding the ice stability, ensure that it is placed on a secure surface so as to prevent possible movement or sliding.

Key Ice Safety Recommendations

When making ice ensure clean and good quality water is used to maintain hygiene.

Check ice regularly to ensure no contaminants or other impurities are present.

When storing ice ensure that it is placed in a clean container and covered to avoid contamination.

Proper Handling and Storage of The Tool:

Keep ice picks in a secured location out of the reach and sight when not in use to avoid any types of accidents. Use of a sheath or any form of a protective cover is encouraged to avoid unnecessary cuts or puncture marks when transporting or putting the ice picks away.

Recognizing and Preventing Usage Hazards:

Always inspect the ice pick that you are using to check for any form of wear or damage which might require a replacement to be made.

Additionally, try your best to avoid using an ice pick near easily flammable materials or in close proximity to other people to reduce any risk to injury.

If mixologists are ever able to follow the aforementioned safety measures, while educating themselves about the tool that they are using, they are free to express their creativity limitlessly without worrying about hurting themselves or their customers.

The Role Ice Picks Behind The Bar

To avoid causing any cuts or other injuries while using an ice pick, there are some safety measures that one should consider whilst using it, and some of them are listed below:

Cut and puncture hazards: An ice pick if not handled correctly can cause cuts or puncture to the skin and, due to this, one must handle it as carefully as possible without making excessive reckless hand movement.

Safe Handling and Storage: The safe handling and storage of the ice pick is highly essential. Any mistake can prove to be fatal. Hence, Make it a point to return the ice pick to a decided place after it has been used, out of sight and reach. During normal storage or while bearing the implement, make use of a protective sheath or cover this will from cuts and punctures.

Regular Inspection: An ice pick should be scrutinized for normal wear and damage at regular intervals. If the ice pick has any bends, cracks or any similar damage, ensure to replace it without delay. Otherwise the ice pick can be a problematic tool as it increases the risk of an accident and the resulting damage.

Avoidance of Potential Hazards: Any hazardous ice pick oxygen that is not localized must be avoided. Make sure to not use the ice pick close to combustibles to avoid unwanted situations. Also take care to avoid working with an ice pick when there is not enough room as that will allow for unnecessary injury to self or other people.

As long as these standards are adhered to and care is taken while using an ice pick, the chances of unforeseen situations like an accident or injury are very slim allowing for a safe and secure environment for yourself and others.

What Are the Safety Concerns When Using an Ice Pick?

What Are the Safety Concerns When Using an Ice Pick?

Important Ice Safety Recommendations

Correct use and the reasonable and secured storage of an ice pick are critical to its effectiveness and to avoid accidents. Here are some important aspects to consider:

Always Secured: The ice pick must be firmly grasped when it is in use, but it should never be used with excessive force. Over application or too much force can cause a slip or loss of control leading to possible injuries.

Proper Placement: The ice pick should be retained in a proper place and out of children or unqualified personnel’s reach when not in use. A combination of a cover and a sheath can be used to avoid unwanted abuse or accidental contact.

Avoid Accidents: More care must be exercised with the cutting edge than is required with other tools. Always maintain the ice pick at a safe distance from cutting surfaces so as not to inflict harm or, ideally, seen. Be very cautious in putting the ice pick to where it is kept or where it is to be used to avert accidental punctures or cuts.

Correct Usage and Preservation of the Tool

Recognizing hazards that may compromise the safe use of the ice pick is of utmost importance to utilize the tool in a more productive manner. Some important facts and figures are mentioned below:

  • Recommendations: Consult with the manufacturer on how to properly use the pick, as that will detail some of the best practices to follow and mistakes to avoid, helping the user make the most out of the tool.`
  • Upkeep and Examination: Check the medieval pick frequently for damage, dullness or any signs of degradation. If the tool begins to lose its edge, it needs to be polished or replaced, that will keep the tool functional. In addition, any excess gunk or dirt on the handle should be wiped off, this might interfere with grip strength.
  • PPE gear: For added protection you may wear gloves and goggles as that should improve resistance against injury while using the ice pick.
  • Teaching and On Boarding: On how to use an ice pick and its safety procedures, training or education is greatly required. Make sure to practice the correct methods of handling an ice pick, ask for help and directions where required.
  • Accident Reporting: In situations, where an accident or near miss occurs, it is crucial to report this to the relevant authority or an onsite supervisor as soon as possible. This ensures that potential hazards are identified and provides an opportunity to take corrective action to mitigate them.

In doing so ,there is also considerable amount of data and details that, in which, can be used to control the way in which an ice pick is used, so they result in no accidents or injuries.

Identification and Prevention of Hazards Associated with Ice Pick Use

While policing the use of an ice pick, ensure that relevant details and data is collated that prevents the occurrence of the ice pick associated hazards. Here are key details and data to consider:

Handle Maintenance: Handles of ice pick tools should routinely be checked to establish their condition free of dirt and sweat which may interfere with the grip of the tool’s user.

PPE: During the use of an ice pick, it is recommended that an individual wear safety gloves and eye protection which enhances safety during this activity. Usage of such equipment decreases the chances of getting hurt while operating the tool.

Training and Education: Adequate training and education on ice pick usage and safety are fundamental. Make sure to learn the right methods of operating the ice pick and ask for assistance or training as appropriate in order to promote safety and efficiency.

Accident Reporting: An employee should report any accident that occurs or any near miss to the appropriate authority or supervisor without fail. Reporting these kinds of incidents assists in preventing more serious injuries from occurring by recognizing and avoiding further unsafe conditions.

Considering these details and data, safety can be enhanced through consideration of ice pick features and its application. It is more than important to comply with the required measures and take the necessary steps in order to avoid unwanted situations arising.

Frequently Asked Questions (FAQs)

Frequently Asked Questions (FAQs)

Q: In terms of activities in a kitchen, where does an ice pick fit in and how is it used?

A: The ice pick gets classified as an apparatus in cutting ice and it seems to be employed by ice cutters or professional bartenders to smash large pieces of ice into smaller bits which are then added to beverages. The application of this device when making cocktails significantly improves a person’s ice drinking experience.

Q: In what ways do ice picks assist mountaineers in their daily activities?

A: Mountaineers utilize ice picks while performing different activities, especially tools climbing or climbing aids working in snowy or slushy expeditions. A mountaineer can easily grasp thin patches of ice and stab them to create footholds, a helpful technique when scaling steep crags or high summits.

Q: Which materials are used to constitute the handle of an ice pick?

A: Some construction companies tend to implement the use of wood or plastic handles for ice picks, but ice pick handles often utilize metal cylinders as handles because they tend to be more durable and are not as prone to breaking. They are made of expensive plastics on the market.

Q: Do you think a certain inch range offers a wider range of functionality for ice picks?

A: The function of the ice picking tool is somewhat determined by its dimensions and its intended purpose as well, while it is also a matter of preference as well. If we consider the size of an ice pick or an ice sculpting knife, the standard measurement is six inches, which allows for precision grinding, most of the camp or any other type of detailed work eight inches would do, which is more suitable for working with bigger pieces of ice.

Q: Is there a criteria set for classifying ice picks as deluxe or commercial?

A: High quality woods used for handles and metal blades used are some common features that commercial or deluxe ice picks tend to have. These metas are often used for professional use as they have a longer length to endure and retain. These for drill have been constructed for heavy usage and are most popular among bartenders and cooks.

Q: What are the safe ways while using an ice pick?

A: One should always firmly grip the wooden handle of an ice pick and work away in a stable area considering keeping one’s blade away from themselves. Users should also be sure to avoid dulling the blade also when not in use should always put the ice pick in a safe place.

Q: What are the and ice engraver tools built different to an antique ice pick?

A: Ice picks can often be more advanced than the classic one, with ergonomic designs and materials being much more user friendly. A modern ice pick differs with antique ones as a modern ice pick incorporates an ergonomic design and advanced tools rather than a simplistic construction with a wooden handle.

Q: What role does an ice pick perform along side with an ice axe while mountaining?

A: An ice pick is significant while mountaining, but an ice axe is more crucial as it is aimed towards self arresting falls or providing more support in harsh icy conditions , cutting into the ice with a larger and robust tool, whereas an ice pick would be used while chipping away at the ice with more precise moves.

Reference Sources

(S et al., 2023) This paper presents a peculiar case of a homicidal ice pick injury observed during an autopsy, where the weapon penetrated the victim’s body in an unconventional manner, challenging traditional assumptions regarding ice pick injuries. The findings underscore the importance of comprehensive forensic analysis to accurately determine the cause and manner of death in criminal investigations.

(Kumarasamy et al., 2022) This case report describes the successful management of an impaled ice-pick stab injury of the suprarenal aorta, which was treated with laparotomy and primary repair of the aortic injury after adequate resuscitation. The case highlights the challenges in managing such penetrating injuries and the importance of early diagnosis and treatment to prevent complications.

(Muthe et al., 2021) This case report describes a transorbital intracranial penetrating injury with an ice pick, where the patient did not present any neurological symptoms or develop rhinorrhea, and was treated conservatively with intravenous antibiotics and corticosteroids. The case emphasizes the need for comprehensive imaging to assess the extent of injury and rule out complications like post-traumatic arterial pseudoaneurysm.

(Thuy et al., 2024) This study compared the efficacy and safety of using 50% trichloroacetic acid (TCA) versus 80% TCA in the CROSS technique for treating ice pick acne scars. The results showed that both concentrations were effective, but the 50% TCA had fewer severe complications, suggesting it may be the preferred option for this treatment.

Ice

Refrigerator

Categorization of our articles
UDPEDIAS

UDPEDIAS is dedicated to creating content that is relevant and valuable to users so that it is safe to start content on this encyclopedic life he takes into account all known encyclopedias, we believe you will like our content!

 

You may be interested in
"90s Hairstyles Trend: The Cutest Haircuts Making a Comeback in 2024"
“90s Hairstyles Trend: The Cutest Haircuts Making a Comeback in 2024”

Fashion and beauty in the 1990s were extraordinary, and the effects can still be seen

Learn More →
Discover the Best Flattering Haircuts for Women with Square Faces
Discover the Best Flattering Haircuts for Women with Square Faces

Selecting the right haircut can be revolutionizing for women with square face shapes. Careful consideration

Learn More →
"Trendy Curtain Bangs: The Must-Try Hairstyle and Haircut for 2024"
“Trendy Curtain Bangs: The Must-Try Hairstyle and Haircut for 2024”

Heightening your hairstyle in 2024? Currently, curtain bangs are regarded as one of the most

Learn More →
Scroll to Top
Get in touch with UDPEDIAS company

Kindly complete the form below to reach out to us. We aim to get back to you within 12 hours. Best of luck!

Contact Form 在用