... .5NTU, CODMN less than 1.5mg / L, iron content of less than 0.05mg / L, SDI less than or equal to 5 ... we are served of Industrial field,such as:petroleum,chemical industry,metallurgy,spinning,printing and dyeing,biology,medicine,foodstuff,papermaking,electron ... be committed in the development of the world environment protection industry,making more contribution to the harmony between human being and ...