Worn diesel engine intake valve guides can result in ()
A. increased engine breathing efficiency
B. excessive valve lash
C. excessive lube oil consumption
D. lower than normal fuel consumptio
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混合气过浓,胶轮车发动机会出现什么现象()。
A. 发动机运转发闷,加速不灵,动力不足
B. 损坏
C. 启动不了
D. 冒黑烟