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单词 air lock
释义 air lock
[`er ´läk]
ENGINEERING
1. A chamber capable of being hermetically sealed that provides for passage between two places of different pressure, such as between an altitude chamber and the outside atmosphere, or between the outside atmosphere and the work area in a tunnel or shaft being excavated through soil subjected to water pressure higher than atmospheric. Also known as lock.
2. An air bubble in a pipeline which impedes liquid flow.
3. A depression on the surface of a molded plastic part that results from air trapped between the surface of the mold and the plastic.
MINING ENGINEERING
A casing atop an upcast mine shaft to minimize surface air leakage into the fan.
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