Field application shows that an immersible pump method is the most ideal method for the oil vacuum unloading system of rail tank wag.

实践表明，卸槽潜油泵法是火车槽车负压卸油系统改造的最理想方法。

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In the unloading process of light oil of tank car, the auxiliary unloading system of light oil pump controlling room is used to substitute the current vacuum unloading system.

在铁路轻油罐车装卸工艺中，采用轻油泵房辅助卸油装置可以替代现有泵房工艺流程中的真空系统。

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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。

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