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| 蝶形轧制法 (of rolling); 弯曲轧制法 (of rolling) | |||
| 蝶形孔型轧制法 | |||
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bending method : 13 phrases in 4 subjects |
| Information technology | 1 |
| Metallurgy | 7 |
| Oil / petroleum | 4 |
| Technology | 1 |
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