空 气过滤器 : 135 phrases in 16 subjects |
Architecture | 2 |
Aviation | 4 |
Chemistry | 4 |
Compressors | 4 |
Ecology | 1 |
Electric machinery | 1 |
Electronics | 9 |
General | 2 |
Metallurgy | 1 |
Nuclear physics | 2 |
Oil processing plants | 1 |
Rail transport | 1 |
Refrigeration | 44 |
Shipbuilding | 5 |
Steel production | 1 |
Technology | 53 |