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| 结构钢 | |||
| 机器用钢; 机械零件用钢 | |||
| 机器钢; 机械制造用结构钢 | |||
| machinery steel: 7 phrases in 3 subjects |
| Business | 1 |
| Mechanics | 2 |
| Metallurgy | 4 |
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