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回 复线 : 19 phrases in 10 subjects |
| Agriculture | 1 |
| Business | 1 |
| Earth sciences | 1 |
| Electric machinery | 1 |
| Electronics | 3 |
| Oil / petroleum | 1 |
| Plastics | 1 |
| Statistics | 1 |
| Technology | 7 |
| Textile industry | 2 |
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