The core of a steam engine is a cylinder that is sealed at one end and has a moving piston at the other.
蒸汽机的核心是汽缸。它一端密封，另一端有个可以移动的活塞。
2
The 14-cylinder engine turns the longest propeller shaft (130 metres) ever built, at the end of which is the largest propeller, weighing in at 130 tonnes.
14缸发动机转动最长的推进器杆(130米)，在其末端是最大的推进器，重130吨。
3
Pressure curves of the cylinderend show a rectangular wave variation under the three controlling schemes mentioned above.