Originally Posted by
TenGrainBread
You could say this about any technical/engineering term. The purpose of having a word for it is so that you don't have to say "A mechanical system actuated by a different controller for each state" every time you want to refer to it.
It's nice to be able to say "threadless headset" instead of "A steering bearing system that uses a compression cap and clamp to adjust bearing preload rather than a threaded nut".
Except in English it’s usually just known as pull-pull controls, desmodromic doesn’t actually seem to mean that and pull-pull is actually more specific.