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显微镜检查法 : 14 phrases in 10 subjects |
| Animal husbandry | 1 |
| Earth sciences | 1 |
| General | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 1 |
| Plastics | 1 |
| Space | 1 |
| Steel production | 2 |
| Technology | 1 |
| Water resources | 3 |
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