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| 51. | hand-feed core drill |
| 手把进给岩心钻机 |
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| 52. | Pickard core barrel |
| 皮卡德岩心管 |
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| 53. | shot core drill |
| 钻粒岩心钻机 |
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| 54. | spindle-type core drill |
| 立轴式岩心钻机 |
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| 55. | CNMARC to Dublin Core Crosswalk Research |
| CNMARC与Dublin Core的转换研究 |
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| 56. | core length of divided seam |
| 分层岩心长度 |
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| 57. | percussion core |
| 冲击钻井取的岩心 |
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| 58. | sinking seafloor core drill |
| 沉入海底岩心钻机 |
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| 59. | percentage recovery of rock core |
| 岩心获得率 |
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| 60. | single core dynamic method |
| 单岩心动力法 |
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