17 PLASTIC MATERIAL IN THE STATE OF SEMI-FINISHED PRODUCTS IN THE FORM OF SHEETS, PLATES, RODS, BLOCKS, SECTIONAL RODS, HOLLOW SECTIONAL RODS AND TUBES; CAST AND INJECTION-MOLDED PARTS MADE OF PLASTIC MATERIAL IN THE SEMI-FINISHED STATE; COMBINED SECTIONAL RODS MADE OF PLASTIC MATERIAL FOR THE MANUFACTURE OF WINDOWS, DOORS, FRAMES, ROLLING SHUTTERS AND BUILDING CONSTRUCTION PARTS; SECTIONAL RODS MADE OF PLASTIC MATERIAL FOR THE MANUFACTURE OF WINDOWS, DOORS, FRAMES, ROLLING SHUTTERS AND BUILDING CONSTRUCTION PARTS. PLASTIC MATERIAL AS FINISHED PRODUCTS FOR BUILDING CONSTRUCTION PURPOSES, NAMELY, SHEETS, PLATES, RODS, BLOCKS, SECTIONAL RODS, HOLLOW SECTIONAL RODS AND TUBES