问题
单项选择题
A combination or all-purpose nozzle produces().
A.low-velocity fog only
B.a solid stream only
C.a solid stream and foam
D.a solid stream and fog
答案
参考答案:D
A combination or all-purpose nozzle produces().
A.low-velocity fog only
B.a solid stream only
C.a solid stream and foam
D.a solid stream and fog
参考答案:D