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Deyuan copper solvent extraction-laboratory reagents suppliers PROCESS MANAGEMENT: The commitment to Quality of copper solvent extraction-laboratory reagents suppliers in Zhengzhou Deyuan Fine Chemicals Co., Ltd. is based on the understanding of what is important for the success of customers. We have established a Quality Management framework that defines processes and assures the proper execution. It incorporates the responsibility of our employees and enables efficient execution across all parts of our organization.solvent agent,chemical agents,good extraction solvent.