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Vacuum Pumps Explained. In this video we learn how vacuum pumps work, the main parts of a vacuum pump and where we use them. This covered the basic working principle of single stage and two stage vacuum pumps...\u003c/span\u003e\n\u003cspan class='full-description hide'\u003eHow do Vacuum Pumps work. Vacuum Pumps Explained. In this video we learn how vacuum pumps work, the main parts of a vacuum pump and where we use them. 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