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电子发射 显微镜 : 30 phrases in 9 subjects |
| Aviation | 1 |
| Earth sciences | 2 |
| Electronics | 10 |
| Geology | 2 |
| Metallurgy | 7 |
| Polymers | 1 |
| Space | 1 |
| Steel production | 1 |
| Technology | 5 |
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