SEMI-PROCESSED PLASTICS IN THE FORM OF HOLLOW FIBER MEMBRANES, FOR USE AS FILTERING MATERIALS IN THE MANUFACTURE OF WATER TREATMENT APPARATUS AND WASTE WATER TREATMENT APPARATUS; SEMI-PROCESSED PLASTIC IN THE FORM OF FILMS FOR USE AS A FILTERING MATERIAL; SEMI-WORKED SYNTHETIC PLASTIC AS SEMI-FINISHED PRODUCTS IN THE FORM OF FOAMS FOR USE AS A FILTERING MATERIAL; PLASTIC SEMI-WORKED PRODUCTS, NAMELY, HOLLOW FIBER PLASTIC INSULATING WATER PROOFING MEMBRANES; SEMI-PROCESSED PLASTICS FOR USE AS ...

WATER TREATMENT APPARATUS AND WASTE WATER TREATMENT APPARATUS, NAMELY, FILTERS EQUIPPED WITH HOLLOW FIBER MEMBRANES FOR DOMESTIC, COMMERCIAL AND INDUSTRIAL USE; WATER PURIFYING APPARATUS, NAMELY, WATER PURIFYING FILTERS EQUIPPED WITH HOLLOW FIBER MEMBRANES FOR DOMESTIC, COMMERCIAL AND INDUSTRIAL USE; WATER PURIFYING EQUIPMENT FOR DOMESTIC, COMMERCIAL AND INDUSTRIAL USE; PURIFYING APPARATUS FOR SURFACE WATER; INDUSTRIAL-WATER PURIFYING APPARATUS; WATER TREATMENT FILTERS; WASTE WATER TREATMENT ...