one(-)way clutch 单向离合器one-way pattern (轮胎)单向花纹one-way valve 单向阀on floor type (空调器)上置地板式on-vehicle service 车上[就车]维护open body (车辆)敞[开]式车身open circuit (电气)断路．开路openbustion chamber (发动机)开式燃烧室统一[不分隔
