n. evacuator
... 抽空装置 排出器 evacuator 水下脏物排出器 underwater garbage ejector 置换器，排出器 displacer ...
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自动抽空装置 EFPA
抽真空装置 [真空] evacuating device
真空泵抽气装置 vacuum pump air removal system
空气抽除装置 air exhauster
实验室多头抽真空装置 Laboratory Vacuum Manifold
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喷雾蜡脱油装置采用双螺杆泵(代替原来蒸汽往复泵)输送喷雾蜡膏油的情况表明，双螺杆泵运行可靠，不易抽空，经济效益良好。
The application of bi - screw pump (instead of former steam reciprocating pump) in the spray wax deoiling unit shows that such pump runs reliably and good economic benefit is also gained.
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