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| 液力井壁泥饼清除器 | |||
| 水力井壁泥饼清除器; 液压井壁泥饼清除器 | |||
| 液压井壁刮刀 | |||
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hydraulic wall scraper : 6 phrases in 3 subjects |
| Drilling | 2 |
| Oil / petroleum | 2 |
| Technology | 2 |
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