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collapsing : 23 phrases in 10 subjects |
| Chemistry | 1 |
| Earth sciences | 2 |
| Electronics | 1 |
| General | 2 |
| Materials science | 3 |
| Medical | 3 |
| Packaging | 7 |
| Statistics | 1 |
| Technology | 2 |
| Transport | 1 |
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