有效表面 : 29 phrases in 14 subjects |
Agriculture | 1 |
Automobiles | 1 |
Aviation | 1 |
Chemistry | 1 |
Electric machinery | 1 |
Electronics | 6 |
Explosives and Explosive Ordnance Disposal | 1 |
Geophysics | 1 |
Metallurgy | 1 |
Plastics | 3 |
Refrigeration | 1 |
Space | 1 |
Technology | 7 |
Wind Energy | 3 |