Machines and machine tools, namely, electric welding machines, orbital electric arc welding machines, mechanized arc welding machines, and parts thereof, equipment for mechanical welding, namely, welding power sources in the nature of welding generators, weld heads as components of welding machines, weld heads for arc welding, wire feeders, welding columns and booms, welding positioners, namely, machines for positioning and turning parts for welding, and custom designed machines for use in we...