dump valve,oil drain valve是什么意思

用法例句

Normal working conditions for oil unloading system and resistance reducing measures are dis- cussed,and different oil unloading process schemes are compared on their economies, to deliver a basis for selection of suitable oil unloading scheme.

论述卸油系统正常工作的条件及减阻措施,并对卸车工艺方案进行经济性比较,为投资者选择合适的卸油方案提供依据。

Application of SUB Sliding Vane Pump in the Long-distance Oil Induction Pipeline Unloading System,;

SUB滑片泵在长吸入管线接卸油系统中的应用

An introduction to three new methods for unloading oil from rail tankers.;

三种铁路卸油新工艺的介绍