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41. | formation compaction |
| 地层压实 |
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42. | ketal formation |
| 酮缩醇的形成 |
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43. | dirty formation |
| 含泥质地层 |
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44. | formation crookedness |
| 地层弯斜度 |
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45. | lamella formation |
| 薄板形成 |
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46. | formation caving |
| 井壁坍塌 |
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47. | laminar formation |
| 层状地层 |
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48. | formation constant |
| 形成常数 |
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49. | Lance Formation |
| 兰斯组 |
|
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50. | formation drillability |
| 地层可钻性 |
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