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1·Three major oil unloading methods used in tank trains are introduced. They are vacuum system, sliding vane pump, and submersible pump unloading.

介绍了轻油铁路卸车主要采用的三种方式，即真空系统接卸、滑片泵(转子泵)接卸和潜油泵接卸。

2·The most common rotary-pump designs used today are spur-gear, generated-rotary, sliding-vane, and screw pump, each type has advantages that make it the most suitable for a given application.

今天最常用的旋转泵是外齿轮泵、内齿轮泵、摆线转子泵、滑动叶片泵和螺旋泵。每种类型的泵都有优点，适合于特定场合的应用。

3·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 oil sealed sliding vane rotary vacuum pump.

组合式空心转子由于轴头与转子体之间的结合面存在着渗漏，使泵的抽气效率性能下降，从而影响其在应用中的效率。

4·The oil sealed sliding vane vacuum pump 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。