7 Electric and/or gas operated welding machines, namely automatic welding machines, spot-welding machines, stable spot-welding machines, multiple spot-welding machines, projection welding machines, continuous seam welding machines, resistance welding machines, plasma welding machines for robots, industrial welding robots; parts for the aforesaid welding machines, namely, welding drums, welding torches, computer-controlled power-operated tools, namely, parts for welding machines for use in supporting and receiving the part to be welded, and mounts for automatic welding machines; industrial spot-welding gun robots, hand-held spot-welding guns, industrial portal robots; welding assembly line units consisting primarily of the aforesaid machines, and industrial welding and portal robots for the execution of the welding process; and pneumatic controls for welding machines, industrial welding robots, and welding assembly line units