单选题Fuel oil tanks must be fitted with （） that can be closed rapidly and remotely in the event of an emergency such as a fire.Astop valvesBnon-return valvesCquick closing valvesDrelief valves
单选题
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
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