单项选择题
消火栓应采用同一型号规格。消火栓口直径应为()。水带长度不应超过(),水枪喷嘴口径不应小于()。
A.65mm,25m,19mm
B.50mm,20m,16mm
C.65mm,30m,19mm
D.50mm,30m,16mm
点击查看答案&解析

单项选择题
A.65mm,25m,19mm
B.50mm,20m,16mm
C.65mm,30m,19mm
D.50mm,30m,16mm
微信扫一扫,加关注免费搜题