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。
These four strokes are intake stroke, compression stroke, power stroke and exhaust stroke.
这四招进气行程，紧缩行程，动力冲程和排气冲程。
These four strokes are intake stroke, compression stroke, power stroke and exhaust stroke.
这四招进气行程，紧缩行程，动力冲程和排气冲程。
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