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线状物 : 20 phrases in 9 subjects |
| Aviation | 1 |
| Desert science | 5 |
| General | 1 |
| Metallurgy | 3 |
| Polymers | 4 |
| Securities | 1 |
| Steel production | 1 |
| Technology | 3 |
| Textile industry | 1 |
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