What is the most vulnerable part of the fire main system on board an offshore rig?（）<br>A:The fire pump<br>B:Exposed hard piping<br>C:The hydrant valve<br>D:The fire hose

What is the most vulnerable part of the fire main system on board an offshore rig?（）
A:The fire pump
B:Exposed hard piping
C:The hydrant valve
D:The fire hose

出自：海船船员证

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