Low compression pressure in a diesel engine can be caused by（）<br>A:improperly seating intake valves<br>B:leaking cylinder liner seal rings<br>C:late fuel injection timing<br>D:carbon deposits on the piston

Low compression pressure in a diesel engine can be caused by（）
A:improperly seating intake valves
B:leaking cylinder liner seal rings
C:late fuel injection timing
D:carbon deposits on the piston

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