A.樓層高度小于或等于5m,每層必須安裝1個(gè) B.樓層高度大于5m,每層不得少于2個(gè) C.管卡安裝高度,距地面應(yīng)為1.5~1.8m D.管卡安裝高度,距地面應(yīng)為1.4~1.6m
A.1.5~1.8m B.1.4~1.8m C.1.5~2m D.1.4~1.6m
A.2mm B.3mm C.4mm D.5mm