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| 硬〔笃，坚，杜拉〕铝; 铝钢; 铝铜锰镁合金; 飞机合金; 硬铝; 杜拉铝; 镁铝合金 | |||
| 硬杜拉铝; 硬鋁 | |||
| 硬铝 (铝铜锰镁合金) | |||
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duralium : 3 phrases in 3 subjects |
| Earth sciences | 1 |
| General | 1 |
| Oil / petroleum | 1 |
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