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Dow RO membraneIn 1897 established in the United States the dow chemical company is a science and technology of transnational companies, mainly give priority to development and production series chemical products, plastic products, and its products and viz., widely used in construction, water purification, papermaking, drugs, traffic, food and food packaging, household and personal care, etc. Our business includes 180 countries and regions, 4.6 million employees worldwide in 2003, the total sales amounting to $33 billion, up more than 3,500 product type.As of the industry leading chemical ente