BS EN 448-2009 区域供暖管道——直埋热水管道网络预保温粘合管道系统——聚氨酯绝热和聚乙烯外壳钢制给水管的成套配件(中文版)
英文名称
District heating pipes — Preinsulated bonded pipe systems for directly buried hot water networks — Fitting assemblies ofsteel service pipes, polyurethane thermal insulation and outer casing of polyethylene