Abnormal crankpin bearing and piston skirt surface wear indicate（）<br>A:a restricted air intake<br>B:a clogged connecting rod oil passage<br>C:incorrect connecting rod alignment<br>D:high cylinder firing temperatures

Abnormal crankpin bearing and piston skirt surface wear indicate（）
A:a restricted air intake
B:a clogged connecting rod oil passage
C:incorrect connecting rod alignment
D:high cylinder firing temperatures

出自：海船船员证

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