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| 法国金; 奥雷德装饰黄铜 (82.75Cu, 16.40Zn, 0.55Sn,0.3Fe) | |||
| 铜锌锡合金 | |||
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French gold : 4 phrases in 3 subjects |
| Business | 1 |
| International trade | 1 |
| Metallurgy | 2 |
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