Plasma arc torch systems for cutting and marking metallic workpieces, comprised of torches, electrical power supplies, electrical leads, and replacement parts therefor; machine tools for metal treatment, laser cutting for metal treatment, laser cutting machines, laser welding machines; Accessories and auxiliary equipment in the nature of machines and machine parts for beam machining of workpieces, and spare parts therefor; Replacement parts and accessories for laser machines and tools; Lasers not for medical use, particularly for material machining, marking lasers; Laser nozzles, laser nozzle holders, laser heads, machines for cutting sheet metal goods, wood and plastics, and parts thereof; laser machine tools; high-temperature cutting machines, nozzles and replacement parts therefor; plasma arc cutting machines and lasers; high-temperature cutting machines and lasers; and lenses for laser cutting machines