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本文仅对蒸汽流真空泵及容积真空泵抽速测试的计算表达式作一简介，并通过滴管 油柱压力单位的直接换算，得出简捷的计算表达式。
In this paper, only the steam flow vacuum pump and volumetric vacuum pump pumping speed calculation of the expression of a brief introduction, and through the dropper oil column pressure unit direct conversion, draw a simple expression.