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| 双联法生产的钢; 双联法生产的钢 | |||
| 二联钢; 双炼钢 | |||
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duplex steel : 8 phrases in 6 subjects |
| Mechanics | 1 |
| Metallurgy | 3 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Space | 1 |
| Technology | 1 |
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