四冲程摩托车用曲轴箱通风系统应当改进。
The crankcase ventilation system for 4-stroke motorcycle should be improved.
曲轴箱通风系统要携带新鲜的空气通过曲轴箱。
The crankcase ventilation system carries fresh air through the crankcase.
曲轴箱通风系统要携带新鲜的空气通过曲轴箱。
The crankcase ventilation system carries fresh air through the crankcase .
所有现代制造的汽车发动机，都需要装备控制曲轴箱有害污染的曲轴箱强制通风系统。
All automobile engines now built are equipped with the positive-crankcase ventilation system of crankcase emission control.
所有现代制造的汽车发动机，都需要装备控制曲轴箱有害污染的曲轴箱强制通风系统。
All automobile engines now built are equipped with the positive-crankcase ventilation system of crankcase emission control.
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