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For example, a test tube holder can be used to hold a test tube while it is being heated. [4] Moreover, when heating the tube with liquid or solid contained inside, the holder ought to tightly hold a test tube [ 5 ] in order for the tube to be safely held while heating.
Crucible tongs are scissors-like tools with a pair of attached arms that curve outward near the ends to form a rounded gripping area that allows users to safely grasp crucibles, flasks, evaporating dishes, or small beakers. [1] They are made of durable metals—stainless steel, brass, or nickel, for example—that can withstand high ...
The tube is usually held by its neck with a clamp or tongs. By tilting the tube, the bottom can be heated to hundreds of degrees in the flame, while the neck remains relatively cool, possibly allowing vapours to condense on its walls. A boiling tube is a large test tube intended specifically for boiling liquids.
Steel tire on a steam locomotive's driving wheel is heated with gas flames to expand and loosen it so it may be slipped over the wheel.. The steel wheel of a steam locomotive and other older types of rolling stock were usually fitted with a steel tire (American English) or tyre (in British English, Australian English and others) to provide a replaceable wearing element on a costly wheel.
The 1 well rack is designed to hold only one test tube or any tube that fits in the space. It is normally made of epoxy-coated steel wire [ 6 ] but can also be made of polystyrene. The racks made from polystyrene are friction-fit and can only hold tubes that match in size to the rack.
Special tools for making crimp connections in electrical and electronic applications are often called crimping pliers or crimpers; each type of connection uses its own dedicated tool. Parallel pliers have jaws that close in parallel to each other, as opposed to the scissor-type action of traditional pliers.
For example, on a bicycle wheel the rim is a large hoop attached to the outer ends of the spokes of the wheel that holds the tire and tube. [3] In cross-section, the rim is deep in the center and shallow at the outer edges, thus forming a "U" shape that supports the bead of the tire casing.
Tongs consist a single band of bent metal, as in sugar tongs, most asparagus tongs (which are no longer common) [2] and the like. Sugar tongs are usually silver, with claw-shaped or spoon-shaped ends for serving lump sugar. Asparagus tongs are usually similar but larger, with a band near the head that limits how far the tongs can expand.
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