(a) any 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…
| 单词 | θ102747 |
| 释义 | the world > space > relative position > closed or shut condition > that which or one who closes or shuts > [noun] > that which closes an aperture > material or composition used for > for specific purpose (2) piston packing1857 (a) any 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… well packing1865 watertight packing used in an oil or gas well, typically to seal a well after the withdrawal of a drill or to seal the gap between a drill pipe… |
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