保护 层 : 412 phrases in 33 subjects |
Agriculture | 1 |
Architecture | 10 |
Astronautics | 1 |
Automobiles | 7 |
Aviation | 7 |
Bridge construction | 18 |
Chemistry | 2 |
China | 1 |
Communications | 1 |
Construction | 3 |
Cosmetics and cosmetology | 1 |
Drilling | 2 |
Earth sciences | 1 |
Ecology | 10 |
Economy | 1 |
Electric machinery | 1 |
Electronics | 10 |
Engineering geology | 3 |
Explosives and Explosive Ordnance Disposal | 2 |
General | 3 |
Hydroelectric power stations | 9 |
Metallurgy | 108 |
Nautical | 5 |
Oil / petroleum | 13 |
Plastics | 7 |
Polymers | 3 |
Rail transport | 3 |
Refrigeration | 2 |
Shipbuilding | 2 |
Space | 9 |
Technology | 155 |
Telecommunications | 2 |
United Nations | 9 |