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| 紧连连接: 42 phrases in 12 subjects |
| Agriculture | 1 |
| Automobiles | 7 |
| Aviation | 1 |
| Drilling | 3 |
| Electronics | 2 |
| General | 2 |
| Life sciences | 2 |
| Nursing | 1 |
| Oil / petroleum | 5 |
| Plastics | 4 |
| Skydiving | 1 |
| Technology | 13 |
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