Apparatus for electric welding; Arc welding apparatus; Electric arc welding apparatus; Electric machines for spark welding; Electric track welding machines; Electric welding machines; Electric welding torches; Electric wire welding apparatus, other than machines; Electrical welding apparatus; Laser welding apparatus; Machines for welding (electric); Metal welding apparatus (electric); Metal welding machines (electric); Robotic electric welding machines; Robotic electrical welding apparatus; Welding apparatus for tig welding (gas-operated); Welding apparatus, electric; Welding machines, electric; Wire welding machines