hgundas 发表于 2019-11-17 21:30:50

BS EN 448: 2015 District heating pipes.



BS EN 448: 2015
District heating pipes. Preinsulated bonded pipe systems for directly buried hot water networks. Fitting assemblies of steel service pipes, polyurethane thermal insulation and outer casing of polyethylene

admin 发表于 2019-11-25 16:23:54

谢谢您的分享,金币已奖励!
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