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三管轮
在工作循环结束后,留在气缸中残余废气最少的柴油机是()。A.非增压四冲程B.增压四冲程C.弯流扫气二
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四冲程筒形活塞式柴油机连杆大端轴承的滑油来自（）。A.曲轴B.活塞销C.飞溅D.专设喷嘴
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Should a person be overcome due to lack of oxygen and high concentration of refrigerant, t
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Which one of the following information can not be found in engine room induction according
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