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Bituminous waterproof felts are main products for waterproofing in China not only at present but in the days to come. 瀝青防水卷材不管是現(xiàn)在還是今后仍將是我國的主導防水產品。 全國瀝青防水卷材的生產發(fā)展很不平衡，總體水平較低。