单选题If the compression rings on a diesel engine piston become stuck in the ring groove, the cause may be due to（）Aexcessive ring actionBexcessive ring temperatureCimproper ring rotationDexcessive ring face wear
单选题
If the compression rings on a diesel engine piston become stuck in the ring groove, the cause may be due to（）
A
excessive ring action
B
excessive ring temperature
C
improper ring rotation
D
excessive ring face wear
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