A.0.5m B.0.6m C.0.8m D.1.2m
A.墻角 B.靠近外墻 C.水平管轉(zhuǎn)彎處 D.最臟、雜質(zhì)最多排水點(diǎn)附近
A.DN50 B.DN75 C.DN100 D.DN150