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EN 489-2009

区域供暖管道.直埋式热水供应网用预先绝热连接的管道系统.聚氨酯热绝缘和聚乙烯外覆层钢管用接头组件

District heating pipes. Preinsulated bonded pipe systems for directly buried hot water networks. Joint assembly for steel service pipes,polyurethane thermal insulation and outer casing of polyethylene

实施日期: 2009-03-01

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