zh-tw:everplast:machine_parts:vacuum_pump
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Vacuum Pump
A vacuum pump is a device that removes gas molecules from a sealed volume in order to leave behind a partial vacuum. The first vacuum pump was invented in 1650 by Otto von Guericke, and was preceded by the suction pump, which dates to antiquity.
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zh-tw/everplast/machine_parts/vacuum_pump.1568887164.txt.gz ยท Last modified: 2019/09/19 09:59 by emma_hsu