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| 81. | orientation selectio |
| 定向选择 |
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| 82. | Orientation Constraint |
| 方向限制 |
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| 83. | orientation device |
| 定向仪 |
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| 84. | growth orientation |
| 生长取向 |
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| 85. | orientation equipment |
| 定向设备 |
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| 86. | orientation law |
| 取向律 |
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| 87. | orientation error |
| 定向误差 |
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| 88. | bottomhole orientation |
| 井底定向 |
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| 89. | orientation factor |
| 定向系数 |
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| 90. | social orientation |
| 社会定向 |
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