Metalworking machines for manufacturing metal products; 3D printers; 3D printers for manufacturing metal products; print heads for metal 3D printers, namely, print heads with inert gas shielding nozzles; inert gas shielding devices being machine parts for metal 3D printers; machine parts for industrial 3D printers, namely, print head assemblies, inert gas shielding nozzles, gas manifolds for print heads, and inert gas supply apparatus being machine parts for industrial 3D printers; metal form...