7 EQUIPMENT FOR RETREADING TIRES-NAMELY, MATRICES FOR MOLDING NEW TREADS ON TIRES; LOADERS AND PRESSES FOR CLOSING THEAD MATRICES; HOISTS FOR HANDLING TIRES; STEAM STATIONS FOR VULCANIZING NEW THEADS; ELECTRIC HEAT CONTROL STATIONS; MOLDS FOR PRECURED TREADS; PRESSES FOR MOLDING PRECURED TREADS; SPOT VULCANIZERS; TIRE BALANCERS