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不同真空度單位的換算
理想的真空是不存在的,我們所指的真空實際上只是低于一個標準大氣壓的氣體狀態,即所謂稀薄的氣體。真空度就是用來度量氣體稀薄程度的一個標準,它實際上指的是氣體壓強,壓強越低,真空度越高,反之越低。所以所謂真空都是指壓強比一個標準大氣壓小的氣體。 早期人們用毫米汞柱作為大氣壓的單位
保持真空泵真空度嚴密性的方法
水環式真空泵是用于抽吸系統中的氣體,然后排向周圍大氣以形成真空,或抽吸周圍的大氣排向系統之中以形成壓力的機械。
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