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Shanghai Donghua Environmental Engineering Co., Ltd. is a chemical engineering company specializing in the research, process development, complete equipment, installation and commissioning of volatile organic compound waste gas and wastewater treatme
Chengdu Ruifensi Dedan Biotechnology Co., Ltd. specializes in the separation of high-purity natural product monomers and the development of production processes. It is a high-tech enterprise that integrates research and development, production. Curre