衡水辽宁排水排污钢带管市政雨污管道钢带管dn1200*SN8施工简单方便实力生产厂 ¥38.00 太原廊坊800*12.5kndn1000/sn12.5hdpe钢带波纹管钢带增强缠绕管批发厂家品质合 ¥38.00 辽宁钢带排水波纹管衡水钢带增强缠绕管DN300/SN8800*12.5kn价低生产批发厂家 ¥38.00 廊坊排水排污钢带管dn1000/sn12.5800*12.5kn石家庄品质合格 ¥38.00 农村排水管道辽宁钢带排水波纹管DN300/SN8排水排污钢带管环刚度达标 ¥38.00 衡水廊坊DN600多少钱钢带排水波纹管钢带增强缠绕管DN400/SN10环刚度达标施工简单方 ¥38.00