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| 谷峰值: 15 phrases in 9 subjects |
| Aviation | 1 |
| Business | 3 |
| Economy | 2 |
| Electronics | 3 |
| Geology | 1 |
| Mathematics | 2 |
| Metallurgy | 1 |
| Piezoelectric crystals | 1 |
| Space | 1 |
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