从扫气口观察活塞环的工作状态时 如发现个别环的表面干燥发黑说明该环可能______。A.正常B.断裂
从扫气口观察活塞环的工作状态时,如发现个别环的表面干燥发黑说明该环可能______。
A.正常
B.断裂
C.弹力不足
D.断裂或弹力不足
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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