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| 31. | ectricians' level |
| 电工水准仪 |
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| 32. | telescope level |
| 望远镜水准器 |
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| 33. | technician level |
| 技术员程度 |
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| 34. | environmental level |
| 在环境中的浓度; 环境浓度水平 |
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| 35. | supervisory level |
| 督导级 |
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| 36. | Cost level |
| 成本费用的水平 |
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| 37. | stimulation level |
| 激励电平 |
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| 38. | executive level |
| 执行一级 |
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| 39. | datum level |
| 基准水平面 |
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| 40. | irrigation level |
| 灌溉水位 |
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