| |||
collateral series | |||
side line |
副系 : 30 phrases in 16 subjects |
Agriculture | 1 |
Air defense | 1 |
Aviation | 5 |
Chemistry | 1 |
Desert science | 1 |
Ecology | 1 |
Economy | 1 |
Electronics | 2 |
General | 3 |
Mathematics | 1 |
Metallurgy | 2 |
Nursing | 1 |
Skydiving | 1 |
Space | 3 |
Sports | 2 |
Technology | 4 |