Ũtuĩria na ũthondeki
Ũtuĩria na ũthondeki nĩ Research and development ũrĩa ũtũmagĩra ũgĩ wa mũthingi kũma maũgĩ ma mathomo.[1]
- ↑ Wragg, David W. (1973). A Dictionary of Aviation (first ed.). Osprey. p. 223. ISBN 9780850451634.
Ũtuĩria na ũthondeki nĩ Research and development ũrĩa ũtũmagĩra ũgĩ wa mũthingi kũma maũgĩ ma mathomo.[1]