At present, digital variable displacement axial pistonpump has some problems.
目前，数字变量轴向柱塞泵还存在着很多问题。
2
Reciprocating pistonpump crankshaft by connecting rods connected with the original motivation. Prime mover can be motor, steam engine can also be used.
往复泵的活塞由连杆曲轴与原动机相连。原动机可用电机，亦可用蒸汽机。
3
The formulae in this paper are founded for axial pistonpump whose rotor's structure is straight axis and auto-location type, but other type of pump can reference it.