抛石: 219 phrases in 17 subjects |
Architecture | 7 |
Aviation | 1 |
Bridge construction | 11 |
Business | 3 |
Construction | 2 |
Electronics | 8 |
Engineering geology | 9 |
Explosives and Explosive Ordnance Disposal | 8 |
General | 6 |
Hydroelectric power stations | 20 |
Jewelry | 1 |
Metallurgy | 8 |
Nautical | 2 |
Oil / petroleum | 2 |
Plastics | 1 |
Rail transport | 3 |
Technology | 127 |