<p>➀ ETH Zürich students created a rotating multi-metal 3D printer that processes multiple metals simultaneously, drastically reducing production time; </p><p>➀ The machine, designed for aerospace and industrial applications (e.g., rocket nozzles, turbines), uses a rotating platform for continuous printing and precise gas flow control; </p><p>➂ ETH filed a patent for this innovation, which aims to scale for larger components and broader use in fields like e-mobility and aviation.</p>