压缩机工作腔不与吸、排气孔口同时相通，无需设置吸、排气阀，这一方面减少了进、排气损失。
Compressor working chamber is not interlink with the suction, exhaust orifice at the same time, without setting suction, exhaust valve, in this regard to reduce the intake, exhaust losses.
在真空排气系统中，必须引蒸汽到汽轮机主轴迷宫式密封，以防真空损失。
In a vacuum exhaust system, sealing steam to the turbine shaft labyrinth seals must be admitted to avoid loss of vacuum.
这可能是最大的单一效率损失所经历的马达一个重要部分粒子在排气。
This is probably the largest single efficiency loss experienced by a motor with a significant fraction of particles in the exhaust.
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