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| 21. | flat mild steel bar |
| 扁型软钢 |
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| 22. | mild steel square bar |
| 软钢方钢 |
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| 23. | mild steel angle bar |
| 软钢角钢 |
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| 24. | mild steel machine screw |
| 机器螺丝 |
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| 25. | mild steel hexagonal bolt |
| 软钢六角螺丝销 |
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| 26. | mild steel wood screw |
| 铁木螺丝 |
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| 27. | mild steel oval bar |
| 软钢椭圆条 |
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| 28. | mild steel fire box |
| 软钢板火箱 |
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| 29. | mild steel plate cutting |
| 软钢板剪口铁 |
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| 30. | mild steel round bar |
| 软钢圆棒材 |
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