A.DN100
B.DN150
C.DN200
D.DN250
A.DN100
B.DN150
C.DN200
D.DN250
A.为了节约成本
B.施工方便
C.满足消防用水需求和供水压力
D.避免管道堵塞
A.环状给水管网的管径不应小于DN150
B.支状管网的管径不宜小于DN100
C.支状管网的管径不应小于DN150
D.环状给水管网的管径不宜小于DN100
A.DN80
B.DN100
C.DN120
D.DN150
A.DN100
B.DN150
C.DN200
D.DN250
A.DN100
B.DN150
C.DN200
D.DN250
A.保护半径=水带长度÷折减系数
B.保护半径=水带长度+折减系数
C.保护半径=水带长度-折减系数
D.保护半径=水带长度×折减系数
A.DN100,DN150
B.DN150,DN200
C.DN200,DN150
D.DN250,DN200
A.20m
B.21.5m
C.22.5m
D.23m