The results of matching some diesel engines indicate that the pump P7100 with top clearance plunger could meet power and exhaust emission requirements of this engine.
与某柴油机配试结果表明，带顶隙柱塞的P7100喷油泵能够满足其功率和排放要求。
2
The shortcoming of top valve housing for standard type oil well pump plunger is wear and rupture of oil flow pore wall.
标准型抽油泵柱塞上阀罩的工作缺陷是出油孔壁磨损断裂。
3
When the hand wheel rotation, through the stem-driven plunger in the middle from top to bottom hole reciprocating movement to complete the valves open and close function.