In order for combustion to occur inside a piping system such as a vapor collection header in a marine emmission control system , there must be().
A.fuel
B.oxygen
C.ignition
D.All of the above
参考答案:D
In order for combustion to occur inside a piping system such as a vapor collection header in a marine emmission control system , there must be().
A.fuel
B.oxygen
C.ignition
D.All of the above
参考答案:D