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硬料 : 80 phrases in 10 subjects |
| Chemistry | 4 |
| Construction | 3 |
| Ecology | 1 |
| Electronics | 7 |
| General | 20 |
| Materials science | 1 |
| Mechanic engineering | 1 |
| Oil processing plants | 6 |
| Silicate industry | 1 |
| Technology | 36 |
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