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| 复 常 数: 25 phrases in 10 subjects |
| Chemistry | 1 |
| Electric machinery | 3 |
| Electronics | 2 |
| Oil / petroleum | 2 |
| Physics | 1 |
| Plastics | 1 |
| Polymers | 1 |
| Space | 2 |
| Technology | 11 |
| Telecommunications | 1 |
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