密 封面: 147 phrases in 18 subjects |
Architecture | 1 |
Automobiles | 32 |
Aviation | 3 |
Chemistry | 5 |
Compressors | 7 |
Drilling | 1 |
Electric machinery | 4 |
Electronics | 5 |
Environment | 1 |
General | 2 |
Hydroelectric power stations | 5 |
Mechanics | 3 |
Metallurgy | 2 |
Oil / petroleum | 7 |
Plastics | 2 |
Space | 8 |
Technology | 58 |
Telecommunications | 1 |