效率系 数 : 25 phrases in 13 subjects |
Bridge construction | 1 |
Business | 2 |
Ecology | 1 |
Electronics | 1 |
Engineering geology | 1 |
Fish farming pisciculture | 1 |
Geology | 1 |
Information technology | 1 |
Mechanics | 1 |
Nautical | 1 |
Project management | 1 |
Research and development | 1 |
Technology | 12 |