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空 气 阀 : 209 phrases in 19 subjects |
| Architecture | 1 |
| Automobiles | 92 |
| Aviation | 11 |
| Chemistry | 1 |
| Compressors | 2 |
| Drilling | 2 |
| Electronics | 5 |
| General | 1 |
| Hydroelectric power stations | 3 |
| Laboratory equipment | 1 |
| Metallurgy | 8 |
| Navigation | 1 |
| Oil / petroleum | 2 |
| Pest control | 1 |
| Rail transport | 6 |
| Refrigeration | 6 |
| Shipbuilding | 19 |
| Space | 1 |
| Technology | 46 |
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