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| 1. | need for a frame of orientation |
| 定向需求 定向需求 |
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| 2. | directional sub |
| 定向接头 |
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| 3. | orientation latchdown sub |
| 定向闭锁接头 |
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| 4. | analyzing adapter |
| 检验接头|分析接头 |
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| 5. | hydraulic orienting sub |
| 水力定向接头 |
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| 6. | directional explosio |
| 定向爆破;定向爆炸 |
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| 7. | bottom hole orientation sub |
| 井下定向接头 |
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| 8. | orientation in space |
| 定向 |
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| 9. | tele-orientation adjustable bent sub |
| 遥控定向可调式弯接头 |
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| 10. | four-way(tube) box |
| 十字接头，四通接头 |
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