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1935change skin color •leisure and entertainment •query and inclusion •gongyi zhengda environmental protection materials co., ltd. is an enterprise mainly engaged in activated carbon materials. its main products include powdered activated carbon, columnar activated carbon, powder activated carbon, coal-based granular activated carbon, fruit shell activated carbon, honeycomb activated carbon, etc., as well as filter materials such as activated alumina spheres, which are priced at a discount. welcome to inquire! •