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| wide-bore | |||
| 开 大 孔: 21 phrases in 9 subjects |
| Agriculture | 1 |
| Anatomy | 1 |
| Drilling | 1 |
| General | 3 |
| Hydroelectric power stations | 1 |
| Nursing | 1 |
| Oil / petroleum | 1 |
| Otorhinolaryngology | 7 |
| Technology | 5 |
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