In a common rail engine, the fuel is injected into cylinders（）<br>A:by injection pumps<br>B:at a time decided by the injection pump timing<br>C:by a signal opening the magnetic valves<br>D:at a time decided by the cam directly

In a common rail engine, the fuel is injected into cylinders（）
A:by injection pumps
B:at a time decided by the injection pump timing
C:by a signal opening the magnetic valves
D:at a time decided by the cam directly

出自：海船船员证

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