Wear occurring at the tips of the reduction gear teeth is usually the result of （）.<br>A:surface fatigue<br>B:fretting corrosion<br>C:heavy overloading<br>D:gear misalignment

Wear occurring at the tips of the reduction gear teeth is usually the result of （）.
A:surface fatigue
B:fretting corrosion
C:heavy overloading
D:gear misalignment

出自：海船船员证

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