Without much further comment, here’s a very deep look into an industrial gas turbine engine. The CAD/CAM work is terrific and one wonders at the design and manufacturing effort put into just this one product.
[Edited 3 September 2018: Original video was taken down by the Youtube poster. Replaced with another link]
[Edited 6 January 2019: No longer available on the backup site, either. Takedowns suspected]
[Edited 13 March 2019: Aaand it is back. For now]