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 apparatus for domestic, commercial and industrial use; PURIFYING APPARATUS FOR SURFACE WATER; INDUSTRIAL-WATER PURIFYING APPARATUS; WATER TREATMENT FILTERS; WASTE WATER TREATMENT ...