THREE-STATION PLASTIC DOOR AND WINDOW WELDER PORTABLE SINGLE-SIDE WELDING SEAM CLEANER ALUMINIUM DOOR|WINDOW DOUBLE-CORNER SAWING MACHINE ALUMINIUM-PLASTIC SECTION DUAL-CORNER SAW TWO-HEAD WELDER FOR PLASTIC DOOR AND WINDOW ANGLE-SEAM CLEANER FOR PLASTIC-STEEL DOOR AND WINDOW DOUBLE-SPINDLE COPY MILL FOR ALUMINIUM-PLASTIC DOOR|WINDOW ANGLE-ASSEMBLYING MACHINE FOR ALUMINUM ALLOY DOOR AND WINDOW ROLLER PRESS PE-AL-PE DOORS AND WINDOWS