This video clip shows a 3D printing technique where a printer head scans over each layer of a part, blowing metal powder that is melted by a laser. It's one of several ways parts are 3D printed at NASA's Jet Propulsion Laboratory, but was not used to create the parts aboard the Perseverance rover. Movie available at https://photojournal.jpl.nasa.gov/catalog/PIA23972
Album Mars_2020_Perseverance