from The Century Dictionary and Cyclopedia
- Of or pertaining to electrotechnics.
Sorry, no etymologies found.
This business goes for Hotels, electrotechnic and agriculture.
As for ‘technic’ words, the only ones I think you’re missing are hydrotechnic (water) and electrotechnic (electricity).
I think you’ve got most of the suffixes already, but water = hydro - or aqua-technic, and electricity could just be … electrotechnic.