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31. | flash joint of rods |
| 钻杆的平头接合 |
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32. | flat head single action spring hinge |
| 平头单向弹簧铰链 |
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33. | flush-cutting saw with wooden handle |
| 木柄平头锯 |
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34. | mild steel countersunk head machine scre |
| 软钢平头机器螺丝 |
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35. | headed atomizer |
| 缺口平头喷雾器 |
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36. | galvanized MS countersunk head machine screw |
| 镀锌平头机器螺丝 |
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37. | straight-pane hammer |
| 平头錾锤 |
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38. | flat head round edge rivet |
| 平头圆边铆钉 |
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39. | a truncate leaf; truncated volcanic mountains; a truncated pyramid. |
| 被削平了的树叶;平头的火山;平头的金字塔。 |
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40. | brass countersunk head wood screw |
| 黄铜平头木螺丝 |
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