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| 21. | precision boring |
| 精镗 |
|
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| 22. | horizontal boring |
| 水平镗孔 |
|
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| | |
| 23. | boring contract |
| 钻探合同 |
|
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| 24. | underground boring |
| 井下钻进 |
|
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| 25. | boring micrometer |
| 镗孔千分尺 |
|
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| 26. | cylindrical boring |
| 镗圆筒孔 |
|
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| 27. | boring porosity |
| 生物钻孔孔隙度 |
|
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| 28. | Boring machine |
| 镗孔机 |
|
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| 29. | percussive boring |
| 撞击钻探 |
|
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| | |
| 30. | boring mechanics |
| 钻探机械 |
|
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