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(上接2008年第3期第80页)3.2机械泵抽气系统清洁真空的获得油封机械真空泵(简称机械泵)广泛应用于真空系统中,多数作为前级真空泵。
(Continued on page 80 of 2008, p. 80) 3.2 Mechanical pump suction system to obtain a clean vacuum Seal mechanical vacuum pump (mechanical pump) is widely used in vacuum systems, most of the front-stage vacuum pump.