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81. | formation fines |
| 地层微粒 |
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82. | shaly formation |
| 泥质地层 |
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83. | sludge formation |
| 淤渣生成 |
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84. | formation restressing |
| 地层应力恢复 |
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85. | competent formation |
| 坚硬地层 |
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86. | formation expense |
| 创业费 |
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87. | formation class |
| 群系纲 |
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88. | formation particle |
| 地层砂粒 |
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89. | formation contaminant |
| 地层污染 |
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90. | formation signal |
| 地层信号 |
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