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凹凸 镜 : 25 phrases in 9 subjects |
| Agriculture | 1 |
| Animal husbandry | 1 |
| Electronics | 2 |
| General | 3 |
| Metallurgy | 3 |
| Nursing | 1 |
| Oil / petroleum | 1 |
| Technology | 12 |
| Telecommunications | 1 |
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