A drop in compression pressure in one cylinder of a diesel engine can be caused by（）<br>A:a leaking fuel injection nozzle<br>B:a clogged air filter<br>C:early fuel injection<br>D:burned valves

A drop in compression pressure in one cylinder of a diesel engine can be caused by（）
A:a leaking fuel injection nozzle
B:a clogged air filter
C:early fuel injection
D:burned valves

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