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61. | repulsive core of the nuclear force |
| 核力排斥心 |
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62. | core-type traction transformer |
| 心式牵引变压器 |
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63. | hard metal core bit |
| 硬质合金取心钻头 |
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64. | reduced core optical fiber |
| 缩小纤心的光纤 |
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65. | valve core removing tool |
| 阀心拆卸工具 |
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66. | air core solenoid |
| 空心螺线管|空气心圆筒形线圈 |
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67. | recovery of core |
| 取心收获率;取岩心 |
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68. | slim-hole core barrel |
| 小井眼取心筒 |
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69. | mechanical core wall |
| 设有设施装置的心墙 |
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70. | double core barrel drill |
| 双筒取心钻具 |
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