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| 造斜〔斜向〕器; 钻孔转向器; 用转向楔改变孔向 | |||
| 造斜器; 槽式变向器 | |||
| 用造斜器侧钻; 变向器; 斜向器 | |||
| 楔尖式钻孔定向器; 偏斜器 | |||
| whipstock: 51 phrases in 3 subjects |
| Drilling | 25 |
| Oil / petroleum | 20 |
| Technology | 6 |
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