The thread title doesn't say "air force", and moreover, turbines on ships are often based on aviation variants. And finally, Z-10 and Z-19 are in the Air Force forum when in fact they are in service with the army. The same can be said about the Z-20 thread. In other words, categorization here at SDF is not a precise science, as many platforms share technologies and components and are used across many service branches. If you can think of a better classification system, be sure to let the webmaster know.
P.S. I had already cross-posted this
in the Type 055 thread before I shared it here. Happy now?