【简答题】Reciprocating piston pumps use a and a back-and- forth motion to displace fluid. During normal operation, the piston pump has a stroke and a stroke.
【判断题】容积型的活塞式往复压缩机Displacement type reciprocating piston compressor:如CNG加气母站;气田后期生产;联合站Such as CNG gas station; Gas field late production; The joint station