suction force pump
... 压力穿孔机：press piercing mill 压力抽气泵：suction force pump 压力成型机：pressing machine ...
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抽气压力泵 sucking and forcing pump
·2,447,543篇论文数据，部分数据来源于NoteExpress
VD精炼炉的真空抽气泵工作时蒸汽压力稳定而流量具有周期性，间断使用。
The pressure of the steam used in the vacuum pump of VD refining furnace is stable, but its flow is periodic.
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