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| classification of materials; material classification | |||
| material sorting | |||
| materials classification | |||
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材料分类 : 22 phrases in 11 subjects |
| Automobiles | 1 |
| Aviation | 2 |
| Business | 6 |
| Commerce | 1 |
| Earth sciences | 1 |
| Economy | 2 |
| Electronics | 1 |
| Finances | 3 |
| General | 1 |
| International trade | 2 |
| Technology | 2 |
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