If the compression rings on a diesel engine piston become stuck in the ring groove, the cause may be due to（）<br>A:excessive ring action<br>B:excessive ring temperature<br>C:improper ring rotation<br>D:excessive ring face wear

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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