An engine which needs four strokes t complete one cycle is four-stroke cycle engine or, for short, a four-cycle engine.

 
  • 發(fā)動(dòng)機完成一個(gè)工作循環(huán),需要四個(gè)行程,就稱(chēng)為四沖程循環(huán)發(fā)動(dòng)機,或者簡(jiǎn)稱(chēng)四沖程發(fā)動(dòng)機。
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