The craft is collaborative: engineers, engineers, and producers repeat on models, refining joints, coatings

https://list-wiki.win/index.php/Why_the_Hardest_Engineers_Specify_Copper:_Customized_Components_That_Prove_Themselves_Over_100_Years

The craft is joint: engineers, engineers, and fabricators repeat on models, refining joints, finishes, and tolerances up until elegant concepts end up being buildable metal.