Pitted reduction gear teeth having a deep blue col
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
请帮忙给出正确答案和分析,谢谢!
参考解答
正确答案:D
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