air lock
air·lock
or air lock A5168500 (âr′lŏk′)air′ lock`
n.
Noun | 1. | air lock - a chamber that provides access to space where air is under pressure |
单词 | air lock | |||
释义 | air lockair·lockor air lock A5168500 (âr′lŏk′)air′ lock`n.
air locklock, air:see air lockair lock,compartment connecting two different environments, usually at different pressures, that enables personnel to transfer from one environment to the other. Space capsules have air locks to enable astronauts to move between the pressurized cabin and the near vacuum of ..... Click the link for more information. . air lock,compartment connecting two different environments, usually at different pressures, that enables personnel to transfer from one environment to the other. Space capsules have air locks to enable astronauts to move between the pressurized cabin and the near vacuum of space. A more common example is the air lock between the outer atmosphere and the working chamber of a caissoncaisson[Fr.,=big box], in engineering, a chamber, usually of steel but sometimes of wood or reinforced concrete, used in the construction of foundations or piers in or near a body of water. There are several types. ..... Click the link for more information. . By its means access can be gained to the working chamber without loss of pressure. It is also used at the head of tunnel excavations underwater. There is a door at each end. When the outer door of the air lock is opened, men or material may be admitted into the compartment. After the outer door is closed, compressed air is admitted to raise pressure in the air lock to the level of the pressure in the working chamber, and the inner door can be opened. The reverse of this procedure takes place on leaving the working chamber. Great care must be exercised in passing workmen through an air lock, so that the change of atmospheric pressure takes place gradually. Too sudden a change of pressure may cause decompression sicknessdecompression sickness, physiological disorder caused by a rapid decrease in atmospheric pressure, resulting in the release of nitrogen bubbles into the body tissues. It is also known as caisson disease, altitude sickness, and the bends. ..... Click the link for more information. . Air lockair lock[′er ‚läk]air lockair lockii. A chamber capable of being hermetically sealed that provides for passage between two places of different pressure, as between an altitude chamber and the outside atmosphere. See AL air lock
Synonyms for air lock
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