CAO 3D : https://www.openscad.org/ documentation (tuto) : https://www.openscad.org/documentation.html?version=2019.05 aide-mémoire : https://www.openscad.org/cheatsheet/index.html?version=2019.05 une bibliothèque : https://github.com/syvwlch/Thingiverse-Projects/tree/master/Threaded%20Library...