DTU 60.5 - Building works - Coper piping - Supply hot and domestic water , drainage of water , rainwater, air conditioning installations - Technical specifications.
建筑工程.銅管道.家用冷熱水供應(yīng)管道.廢水, 雨水排放管和空調(diào)安裝管.技術(shù)規(guī)范.
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