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。
The pilot unloading valve 5 of the one-way valve can be achieved system-pressure pump and unloading.
由于先导卸荷阀5内的单向阀作用，可以实现系统保压而油泵卸荷。
We have designed a new water pump that the electromotor of unloading is followed.
我们设计了一个带有随装随卸的电动机的新水泵。
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