单词 | molecular drag pump |
释义 | molecular drag pump [mǝ`lek·yǝ·lǝr `drag ´pǝmp] ENGINEERING A vacuum pump in which pumping is accomplished by imparting a high momentum to the gas molecules by impingement of a body rotating at very high speeds, as much as 16,000 revolutions per minute; such pumps achieve a vacuum as high as 10-6 torr. |
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