Comparison of vacuum is made between the single and double suction vacuum pump, between the unit with balance passage and that without balance passage.
对单级与双级抽气开平衡通道与不开平衡通道的真空泵的真空度进行了对比分析。
Comparison of vacuum is made between the single and double suction vacuum pump, between the unit with balance passage and that without balance passage.
对单级与双级抽气开平衡通道与不开平衡通道的真空泵的真空度进行了对比分析。
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