| |||
development engineering | |||
engineering development (设计阶段的一部分); engineering | |||
engineering development |
工程研制: 52 phrases in 7 subjects |
Air defense | 2 |
Aviation | 31 |
Electronics | 4 |
Explosives and Explosive Ordnance Disposal | 1 |
General | 2 |
Space | 11 |
United States | 1 |