Steven F. Udvar-Hazy Center: main hall panoramaImage by Chris Devers
See more photos of this, and the Wikipedia article.
Details, quoting from Smithsonian National Air and Space Museum | _details_pending_:
Aerospace tooling involves various complex process required in aircraft manufacturing… http://www.datacorptechnology.com/wp-content/uploads/2014/11/5777123272_7405b0aab4.jpg