PP-R environmental protection/ Flange ring

◎住宅建筑內冷(leng)熱(re)(re)(re)水(shui)(shui)(shui)用(yong)(yong)管◎凈水(shui)(shui)(shui)、純水(shui)(shui)(shui)輸(shu)(shu)送用(yong)(yong)管◎熱(re)(re)(re)水(shui)(shui)(shui)循(xun)環(huan)與(yu)供熱(re)(re)(re)采暖(nuan)用(yong)(yong)管◎自來水(shui)(shui)(shui)配(pei)管◎養(yang)殖(zhi)業用(yong)(yong)管◎水(shui)(shui)(shui)處理用(yong)(yong)管◎食(shi)品、飲料、藥(yao)物工廠輸(shu)(shu)水(shui)(shui)(shui)用(yong)(yong)管◎工業冷(leng)熱(re)(re)(re)水(shui)(shui)(shui)輸(shu)(shu)水(shui)(shui)(shui)管◎中央空(kong)調冷(leng)凝水(shui)(shui)(shui)輸(shu)(shu)送◎壓縮空(kong)氣用(yong)(yong)管