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| 51. | sampling by impaction |
| 撞击取样 |
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| 52. | knock-on reaction |
| 撞击反应 |
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| 53. | accelerating impact |
| 加速撞击 |
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| 54. | Impact Test |
| 撞击试验 |
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| 55. | chain collision |
| 连环撞击 |
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| 56. | percussive boring |
| 撞击钻探 |
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| 57. | percussion figure |
| 撞击图像 |
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| 58. | husking by impact |
| 撞击脱壳 |
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| 59. | percussion primer |
| 撞击底火 |
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| 60. | percussive device |
| 撞击装置 |
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