Fuel oil tanks must be fitted with （） that can be closed rapidly and remotely in the event of an emergency such as a fire.<br>A:stop valves<br>B:non-return valves<br>C:quick closing valves<br>D:relief valves

Fuel oil tanks must be fitted with （） that can be closed rapidly and remotely in the event of an emergency such as a fire.
A:stop valves
B:non-return valves
C:quick closing valves
D:relief valves

出自：海船船员证

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