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31. | hydraulically rough |
| 水力粗糙的 |
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32. | asperity contact |
| 粗糙面接触 |
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33. | rough angular quarrystone |
| 粗糙棱角矿石 |
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34. | coarsely manufacture |
| 制造得粗糙 |
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35. | rough-walled fracture |
| 粗糙壁裂缝 |
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36. | A coarse grain. |
| 粗糙的微粒 |
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37. | rough hardfacing |
| 粗糙硬化表面 |
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38. | It has a rough surface. |
| 它表面粗糙。 |
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39. | harsh Burlap; |
| 粗糙的麻布袋; |
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40. | rotary roughening |
| 旋转粗糙法 |
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