The final step came when steam was introduced into the cylinder to drive the piston backward as well as forward, thereby increasing the speed of the engine and cutting its fuel consumption.
最后一步是将蒸汽引入气缸，使得活塞前后推动，从而提高了发动机的速度，降低了燃料消耗。
2
This portable machine applicable to small and medium-sized steam aerated block factory of gas cutting blocks.
本移动式切割机适用于中小型蒸养加气块在厂的加气块切割。
3
The applications of new tool material to the cutting of difficult-to-process material of steam turbine at home and at aboard were presented.