They're not 100% machine-built. It just means the spoke tensioning and truing weren't done manually. The "How It's Made" video below shows wheels being made, including manual and machine spoke tensioning.
http://www.youtube.com/watch?v=xYUOLGEPw9Q
There are plenty of other videos, too...
https://youtu.be/Am_8X8BnY7o
https://youtu.be/5lGKdRxdYKI
https://youtu.be/EITEQLn8SUE
Last edited by SkyDog75; 03-15-16 at 07:37 PM.