3D printers; 3D printing apparatus, namely, metal 3D printers; machine plasma arc torches for depositing, cladding, and welding metal; machine tools for working metals, namely, metal forming machines; machines for shaping metal; metal processing machines, namely, metal forming machines, metal cold-working machines, metal hot-working machines; electric metal welding machines; gas-powered metal welding machines; metal working machines; metalworking machines; metal-working machines; electric wel...