单项选择题
A.in a locked cabinet in the machinery space
B.in an unlocked cabinet in the machinery space
C.in a separate and accessible location
D.at a fire hydrant location
单项选择题 Each fire pump on a ship must have a pressure gauge located at（）.
单项选择题 Each fire hydrant serving machinery spaces containing oil fired boilers，internal combustion machinery，or oil fuel units must be equipped with a（）.
单项选择题 Each fire hydrant must have at least one spanner and at least one（）.