In a HFPE, the free piston assembly is driven back and forth between two outer deadcenters by fuel energy, and at the same time hydraulic oil is pumped out for energy.
在左、右动力腔的交替驱动下，HFPE的活塞组件在腔体中作往复直线运动，同时泵出液压油驱动负载工作。
2
Many thousands on both sides had been wounded. The wounded were moved to medical centers for treatment. The dead were buried.
双方数千士兵受伤，伤兵移往医疗中心进行治疗，阵亡者被埋葬。
3
The movie centers on a 50-year romance between the dead and the living.