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| avoidance of underground obstacle | |||
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绕障 : 17 phrases in 12 subjects |
| Automobiles | 2 |
| Drilling | 2 |
| Ecology | 1 |
| Electricity generation | 1 |
| Electronics | 1 |
| Hydroelectric power stations | 2 |
| Nursing | 1 |
| Oil / petroleum | 2 |
| Otorhinolaryngology | 1 |
| Rowing | 1 |
| Technology | 2 |
| Telecommunications | 1 |
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