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Bleaching powder is of strong alkaline corrosive performance, which is usually intended to remove the natural colour of fibres, yarns, other textiles, and paper.

Bruce 发表于 2024-11-22 12:15:14 [显示全部楼层] 回帖奖励

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Bleaching powder is of strong alkaline corrosive performance, which is usually intended to remove the natural colour of fibres, yarns, other textiles, and paper.