Electric power generators, direct current electric generators, medium and high frequency electric generators for industrial lasers and for vacuum creating and plasma applications

MACHINE TOOLS INCORPORATING A LASER FOR CUTTING, WELDING, MARKING AND THERMALLY TREATING SHEET METAL WORKPIECES, NAMELY, LASER CUTTING MACHINES FOR METALWORKING, LASER WELDING MACHINES; LASER ETCHING MACHINES AND LASER MACHINES FOR DIRECTING A LASER BEAM ONTO AN AREA OF A METAL WORKPIECE TO HEAT THE WORKPIECE AND TO ALTER THE PHYSICAL PROPERTIES IN THAT AREA