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| 紫铜; 赤铜 | |||
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red copper : 19 phrases in 8 subjects |
| Ceramics | 1 |
| Desert science | 1 |
| Earth sciences | 1 |
| Exhibitions | 1 |
| Food service and catering | 2 |
| Metallurgy | 3 |
| Technology | 8 |
| Textile industry | 2 |
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