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| 51. | mild steel hexagonal socket screw |
| 六角凹头螺丝 |
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| 52. | bright mild steel hexagonal nut |
| 光亮软钢六角螺丝帽 |
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| 53. | black mild steel hexagonal nut |
| 黑铁六角螺丝帽 |
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| 54. | galvanized mild steel square nut |
| 镀锌四方螺丝帽 |
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| 55. | rolled mild steel disk wheel |
| 轧制软钢实心轮 |
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| 56. | galvanized mild steel link chain |
| 镀锌铁链条 |
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| 57. | bright mild steel square nut |
| 四方冲光螺丝帽 |
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| 58. | galvanized mild steel roofing screw |
| 镀锌瓦楞螺丝 |
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| 59. | copper coated mild steel wire |
| 镀铜软钢丝 |
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| 60. | mild sheet steel |
| 软钢板 |
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