'Next-gen 3D printing' enables printing with two different materials at once — faster, lighter, and more precise multiplexing nozzle tech demoed by U.S. gov't scientists

https://www.tomshardware.com/3d-printing/next-gen-3d-printing-demonstrated-by-u-s-government-scientists-multiplexing-nozzle-system-touted-as-faster-lighter-and-more-precise-for-aerospace-and-marine-industries