Installations, machines, apparatus and equipment for welding and cutting, namely, electric arc welding machines, plasma welding machines, laser welding machines and autogenous welding and cutting machines and equipment or electric welding and cutting torches; parts, adapted parts and fittings for the aforesaid goods, namely, electrode holders, gas nozzles, current contact tips, welding gas burner connections, protective gas connecting hoses, nozzle sets, gas diffusers, gas lenses, clamping sl...