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| 71. | multidiameter boring cutter |
| 多直径镗孔铣刀 |
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| 72. | core boring method |
| 取心钻探法 |
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| 73. | Foraky boring method |
| 佛拉奇钻孔法 |
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| 74. | boring for shafting |
| 轴系镗孔 |
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| 75. | automatic boring machine |
| 自动镗床 |
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| 76. | hollow boring bit |
| 空心钻头 |
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| 77. | tube sample boring |
| 取样钻孔 |
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| 78. | boring by rotation |
| 旋转钻井 |
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| 79. | cable percussion boring |
| 钢绳冲击钻探 |
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| 80. | boring machine parts |
| 镗床零件 |
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