Symbols from the Aliens Universe, https://alienanthology.fandom.com/wiki/Semiotic_Standard
Maybe a bit of licence taken, making up a 3D printing Semiotic symbol, but who's to say what will happen in 2078?
50x150mm Made to print with layer change colors
white 0.0-0.8mm
red 0.8-1.2
Grey 1.2-1.6