Valves in the cylinder head of a diesel engine are opened by the direct action of the（）<br>A:exhaust pressure<br>B:valve spring pressure<br>C:rocker arm movement<br>D:wrist pin movement

Valves in the cylinder head of a diesel engine are opened by the direct action of the（）
A:exhaust pressure
B:valve spring pressure
C:rocker arm movement
D:wrist pin movement

出自：海船船员证

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