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剖 分 图 : 20 phrases in 9 subjects |
| Automobiles | 4 |
| Chemistry | 3 |
| Drilling | 1 |
| Earth sciences | 1 |
| Electric machinery | 1 |
| Electronics | 1 |
| General | 1 |
| Oil / petroleum | 1 |
| Technology | 7 |
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