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单词 piston packing
释义

piston packing

noun
1Any material used for filling the space between a piston head and the cylinder within which it moves, so as to prevent steam, air, etc., leaking out.
2A mechanical device for inserting such packing material around a piston head.

Origin

Mid 19th century; earliest use found in Scientific American.

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更新时间:2024/12/23 11:52:08