The standard sized flanges provided at every strategically positioned fire hydrant on board are known as______.(1.0)
A.isolating valve B.international shore connection C.relief valve D.fire control plan正确答案B
The standard sized flanges provided at every strategically positioned fire hydrant on board are known as______.(1.0)
A.isolating valve B.international shore connection C.relief valve D.fire control plan正确答案B
