The oilsealed sliding vane vacuumpump is one of basic vacuum production equipments, wide application and more requirement.
油封式旋片真空泵是真空技术中最基本的真空获得设备之一，应用面广而量大。
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As there were leak on contact place between shaft and rotor body in built up hollow rotor, dropping discharg gas speed of pump and efficiency applied of oilsealed sliding vane rotary vacuumpump.