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DuPont Filmtec Bw30 400 440I Industrial 4040 8040 RO Membrane for Brackish Water Desalination, Find Details and Price about RO Membrane Reverse Osmosis Membrane from DuPont Filmtec Bw30 400 440I Industrial 4040 8040 RO Membrane for Brackish Water Desalination - SuZhou NANOVELA Technology Co., Ltd.