柱塞相对于活塞的相对轴向运动在柱塞内造成真空。
The relative axial movement of the plunger in relation to the piston causes a vacuum to be created within the plunger.
通过分析认为气压机凝汽器取热能力不足是造成真空度低的主要原因。
Main cause has been analyzed and it resulted from the inadequate heat removal of the steam condenser in gas compressor.
并在分析造成真空度不稳定原因的基础上，阐述了的电子束炉真空系统的控制方案及其算法。
The project and arithmetic how to control the vacuum deg ree are introduced by the analysis of the reason why the vacuum deg ree is unstable.
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