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灰沉积 : 33 phrases in 10 subjects |
| Agriculture | 4 |
| Automobiles | 2 |
| Desert science | 4 |
| Electronics | 2 |
| Engineering geology | 1 |
| General | 1 |
| Metallurgy | 3 |
| Oil / petroleum | 3 |
| Plastics | 1 |
| Technology | 12 |
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