Why is the two-stroke engine widely used on board ship?
为什么是二冲程发动机被广泛使用在船上？
This is very similar to a 2-stroke engine.
这是非常相似的2冲程发动机。
On a 2-stroke engine, the upward stroke is the compression stroke.
在2冲程发动机，向上中风是压缩行程。
Four stroke horizontal engine.
四冲程发动机的水平。
Four stroke horizontal engine.
四冲程发动机的水平。
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