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| 31. | extra-heavy drill rod |
| 加重钻杆 |
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| 32. | accentuated contrast |
| 加重对比度 |
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| 33. | A difficulty is aggravated. |
| 困难加重。 |
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| 34. | Increasing Duty |
| 加重关税 |
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| 35. | high-frequency emphasis |
| 高频加重 |
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| 36. | high-density weighting material |
| 加重材料 |
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| 37. | centre weight governor |
| 加重调速器 |
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| 38. | kill-weight fluid |
| 加重压井液 |
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| 39. | cumulative punishment. |
| 加重处罚 |
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| 40. | The act of aggravating or the state of being aggravated. |
| 加重；加剧；恶化加重恶化的行为或被加重、恶化的状态 |
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