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Visual inspection of chrome－plated piston compression rings reveals a black ring face at t..

2020-09-18 20:38:32 资格考试 阅读

问题详情

A.has a crown-face

B.exceeds wear limits through normal wear

C.has excessive blow-by

D.is in good condition

请帮忙给出正确答案和分析，谢谢！

参考答案

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