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31. | optical erasure |
| 光学消除 |
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32. | fault clearance |
| 故障消除 |
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33. | noise elimination |
| 消除噪声 |
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34. | pollution abatement |
| 消除污染 |
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35. | cancellation circuit |
| 消除电路 |
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36. | background eradication |
| 本底消除 |
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37. | removal of gases |
| 消除气体 |
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38. | selective erasure |
| 选择性消除 |
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39. | release of work hardening |
| 消除加工硬化 |
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40. | eradication of disease |
| 消除疾病 |
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