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隔环 : 68 phrases in 20 subjects |
| Agriculture | 1 |
| Anatomy | 1 |
| Automobiles | 8 |
| Aviation | 2 |
| Chemistry | 3 |
| Compressors | 3 |
| Computer networks | 1 |
| Drilling | 4 |
| Ecology | 1 |
| Electric machinery | 4 |
| Electronics | 5 |
| General | 2 |
| Mechanic engineering | 1 |
| Metallurgy | 3 |
| Mining | 3 |
| Oil / petroleum | 6 |
| Power system protection | 1 |
| Space | 1 |
| Surgery | 1 |
| Technology | 17 |
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