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  2. Test tube rack - Wikipedia

    en.wikipedia.org/wiki/Test_tube_rack

    Test tube rack. Test tube racks are laboratory equipment used to hold upright multiple test tubes at the same time. They are most commonly used when various different solutions are needed to work with simultaneously, for safety reasons, for safe storage of test tubes, and to ease the transport of multiple tubes. Test tube racks also ease the ...

  3. Test tube holder - Wikipedia

    en.wikipedia.org/wiki/Test_tube_holder

    A test tube holder is used to hold test tubes. [ 1] It is used for holding a test tube in place [ 2] when the tube is hot or should not be touched. [ 3] 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 ...

  4. Litz wire - Wikipedia

    en.wikipedia.org/wiki/Litz_wire

    Litz wire consists of multiple strands insulated electrically from each other. Ordinarily the strands are twisted or woven, but no twisting is shown in this diagram. Litz wire is a particular type of multistrand wire or cable used in electronics to carry alternating current (AC) at radio frequencies. The wire is designed to reduce the skin ...

  5. Ethernet frame - Wikipedia

    en.wikipedia.org/wiki/Ethernet_frame

    It is immediately followed by the Ethernet frame, which starts with the destination MAC address. [ 1] In computer networking, an Ethernet frame is a data link layer protocol data unit and uses the underlying Ethernet physical layer transport mechanisms. In other words, a data unit on an Ethernet link transports an Ethernet frame as its payload.

  6. Retort stand - Wikipedia

    en.wikipedia.org/wiki/Retort_stand

    Retort stand. In chemistry, a retort stand, also called a clamp stand, [ 1] a ring stand, [ 2] or a support stand, [ 3] is a piece of scientific equipment intended to support other pieces of equipment and glassware — for instance, burettes, test tubes and flasks. [ 4]

  7. Fuse (electrical) - Wikipedia

    en.wikipedia.org/wiki/Fuse_(electrical)

    Fuse (electrical) A miniature time-delay 250 V fuse that will interrupt a 0.3 A current at after 100 s, or a 15 A current in 0.1 s. 32 mm (1 1/4") long. In electronics and electrical engineering, a fuse is an electrical safety device that operates to provide overcurrent protection of an electrical circuit. Its essential component is a metal ...

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