气 封 : 149 phrases in 18 subjects |
Automated equipment | 1 |
Automobiles | 5 |
Aviation | 3 |
Cement | 1 |
Drilling | 1 |
Electric machinery | 1 |
Electricity | 1 |
Electronics | 35 |
General | 41 |
Geology | 6 |
Metallurgy | 1 |
Nautical | 1 |
Nuclear and fusion power | 1 |
Oil processing plants | 7 |
Oilfields | 3 |
Refrigeration | 1 |
Technology | 39 |
Thermal engineering | 1 |