Introduzione
Un modello 3D interattivo di un sistema a cremagliera e pignone.
Risorse aggiuntive
https://en.wikipedia.org/wiki/Rack_and_pinion
https://khkgears.net/new/gear_rack.html
https://www.explainthatstuff.com/gears.html
https://www.thomasnet.com/articles/machinery-tools-supplies/rack-and-pinion-gears