| |||
trunk | |||
main | |||
arterial | |||
| |||
mains-operated |
干线 的 : 46 phrases in 14 subjects |
Air defense | 2 |
Architecture | 3 |
Automobiles | 8 |
Aviation | 1 |
Drilling | 1 |
Electronics | 2 |
General | 8 |
Geophysics | 1 |
Logistics | 1 |
Metallurgy | 2 |
Oil / petroleum | 1 |
Space | 3 |
Technology | 12 |
Telecommunications | 1 |