The AutoCAD sample nozzle drawing file created by Don Strimbu back in the 80s has come along ways in twenty years. There is now a 3D DWF file fo the updated nozzle that was done in Autodesk Inventor.
The nozzle from 20 year old AutoCAD 2.18.
The new Nozzle in a 3D DWF in the Free Autodesk DWF Viewer!
The animated GIF above just not do the actual free DWF viewer and file justice. You can download the DWF files from the URLs below. Credit goes to Mike Geyer of Autodesk for the updated Nozzle.
To view the DWF files, you will need the small and free Autodesk DWF Viewer. http://www.autodesk.com/DWF
The 3D DWF is fast and beautiful as well as smart. You can navigate the parts of a object and change display representations. That means you can isolate or highlight parts of a mechanical assembly or sections and parts of a building right down to a wall on a certain floor. 3D DWF is much better than the late comer 3D PDF. The 3D PDF appears to only be a low qualty object texture drape and little to no object intelligence. Do you want a dumb box with a low quality texture or a real building with textured rooms and objects with intelligence and data? The below image is from a 3D DWF where you can navigate right down to the nice textured room of a larger building and even hide or isolate each object.
And yes, I still run AutoCAD 2.18 from time to time for fun to see how far AutoCAD has progressed. More unofficial AutoCAD history can be found Here.