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泄 放阀 : 79 phrases in 17 subjects |
| Architecture | 2 |
| Automobiles | 7 |
| Aviation | 5 |
| Compressors | 7 |
| Construction | 1 |
| Drilling | 3 |
| Electronics | 1 |
| General | 1 |
| Hydroelectric power stations | 3 |
| Mechanic engineering | 1 |
| Metallurgy | 5 |
| Oil / petroleum | 6 |
| Oil processing plants | 1 |
| Plastics | 2 |
| Rail transport | 2 |
| Space | 2 |
| Technology | 30 |
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