Pitted reduction gear teeth having a deep blue color with evidence of overheating have been operated with （）<br>A:excessive speed<br>B:improper warm-up<br>C:extreme misalignment<br>D:inadequate lubrication

Pitted reduction gear teeth having a deep blue color with evidence of overheating have been operated with （）
A:excessive speed
B:improper warm-up
C:extreme misalignment
D:inadequate lubrication

出自：海船船员证

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