Fire hose couplings ______.A.are made of bronze brass or soft alloy metalsB.should be pai
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Fire hose couplings ______.
A.are made of bronze brass, or soft alloy metals
B.should be painted red in order to identify hose lengths
C.are specially hardened to prevent crushing
D.should be greased frequently
请帮忙给出正确答案和分析,谢谢!
