前级真空

/ qián jí zhēn kōng /

1
coarse vacuum
... Coanda effect,附壁效应 coarse vacuum,粗真空；前级真空 coastal zone color scanner(CZCS),海岸带水色扫描器 ...
2
fore vacuum
... fore vacuum 前级真空 ; 预真空 fore wing 前翅 ; 方者称为前翅 fore stay 前牵索 ; 前支索 ...
3
prevacuum
... preventivemaintenance预防性维修；预防性维护 prevacuum前级真空，粗真空 pressurevessel压力容器 ...
4
forvacuum
... forum论坛 forvacuum前级真空 forwardagency运输业 ...

短语

1
由于罗茨泵是一种无内压缩的真空泵，通常压缩比很低，故高、中真空泵需要前级泵。
As the Roots pump is a non-vacuum inside the compression, the compression ratio is usually very low, so high, medium and vacuum pumps need to pump before.
2
本机组采用罗茨泵作为主泵，以旋片式真空泵作为前级泵。
The set takes Roots pump as its main pump and spinning vacuum pump as pre-stage pump.
3
在涡轮分子泵的前级侧充气，能强制使碳氢化合物立刻通过涡轮分子泵流入真空室。
Turbo molecular pump in the first grade side of the inflatable, can force the hydrocarbons into the immediate adoption of turbo-molecular pump chamber.

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