The pump has a constant stroke and the amount of fuel delivered is regulated by rotating （） which has a specially arranged helical groove cut into it.<br>A:the pump cylinder<br>B:the pump cam<br>C:the pump plunger<br>D:the pump miler

The pump has a constant stroke and the amount of fuel delivered is regulated by rotating （） which has a specially arranged helical groove cut into it.
A:the pump cylinder
B:the pump cam
C:the pump plunger
D:the pump miler

出自：海船船员证

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