ELECTRICAL WELDING EQUIPMENT, NAMELY WELDING TORCHES, KITS COMPRISING COLLET BODIES AND CONNECTORS FOR CONVERTING WELDING TORCHES FROM ELECTRIC OPEN ARC WELDING TO TUNGSTEN-INERT-GAS WELDING, ELECTRICAL WELDING ACCESSORIES, NAMELY COOLING UNITS FOR WELDING TORCHES, POWER CABLES, INSULATING AND CONVERSION HANDLES