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(一)、欧典花园:管道采用开槽施工,雨水管主要采用HDPE-A型缠绕管(环钢度 8 级)和II级承插式钢筋砼管,DN200 共计约 129 米,DN300 共计约 233 米,DN400 共计约 769 米, DN600 共计约 67 米,DN800 钢筋砼管共计约 79 米;污水管主要采用 PE100 聚乙烯实壁管, DN225 共计约 5 米,DN300 共计约 96 米,DN400 共计约 1579 米;新建Φ700 雨水检查井共计 6 座,Φ1000 雨水检查井共计 22 座,Φ1250...