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materials of processing : 26 phrases in 13 subjects |
| Automobiles | 1 |
| Aviation | 1 |
| Business | 8 |
| Commerce | 1 |
| Earth sciences | 1 |
| Ecology | 1 |
| Economy | 1 |
| General | 3 |
| International trade | 1 |
| Shipbuilding | 1 |
| Space | 3 |
| Technology | 2 |
| Textile industry | 2 |
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