Low compression pressure in a diesel engine is caused by（）<br>A:low water in the expansion tank<br>B:improperly seated valves<br>C:low fuel oil pressure<br>D:worn or broken cylinder liner sealing rings

Low compression pressure in a diesel engine is caused by（）
A:low water in the expansion tank
B:improperly seated valves
C:low fuel oil pressure
D:worn or broken cylinder liner sealing rings

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