DN1200雙線供水

供(gong)水管(guan)(guan)(guan)(guan)網的布(bu)置有枝(zhi)狀(zhuang)和(he)環狀(zhuang)兩種基(ji)本形式。前者干管(guan)(guan)(guan)(guan)和(he)支(zhi)管(guan)(guan)(guan)(guan)分(fen)明，形成(cheng)樹枝(zhi)狀(zhuang)；后者管(guan)(guan)(guan)(guan)道縱橫(heng)相互接通形成(cheng)環狀(zhuang)。供(gong)水管(guan)(guan)(guan)(guan)網由眾(zhong)多水管(guan)(guan)(guan)(guan)連接而成(cheng)，水管(guan)(guan)(guan)(guan)材料(liao)可分(fen)非金屬(shu)管(guan)(guan)(guan)(guan)（鋼(gang)(gang)筋(jin)混(hun)凝(ning)土管(guan)(guan)(guan)(guan)、塑(su)料(liao)管(guan)(guan)(guan)(guan)、加強玻璃(li)纖(xian)維管(guan)(guan)(guan)(guan)、鋼(gang)(gang)塑(su)復合管(guan)(guan)(guan)(guan)、鋼(gang)(gang)套筒(tong)預(yu)應力鋼(gang)(gang)筋(jin)混(hun)凝(ning)土管(guan)(guan)(guan)(guan)等）和(he)金屬(shu)管(guan)(guan)(guan)(guan)（鑄(zhu)(zhu)鐵管(guan)(guan)(guan)(guan)、球墨鑄(zhu)(zhu)鐵管(guan)(guan)(guan)(guan)、鋼(gang)(gang)管(guan)(guan)(guan)(guan)等）。