The lifting pressure of （） is set in the presence of a Surveyor it is locked and cannot be changed.<br>A:fuel valves of main engine<br>B:injector pump of main engine<br>C:safety valves of marine boiler<br>D:safety valves of a reciprocating pump

The lifting pressure of （） is set in the presence of a Surveyor it is locked and cannot be changed.
A:fuel valves of main engine
B:injector pump of main engine
C:safety valves of marine boiler
D:safety valves of a reciprocating pump

出自：海船船员证

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