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61. | addressing level |
| 寻址级 |
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62. | ectricians' level |
| 电工水准仪 |
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63. | executive level |
| 执行一级 |
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64. | alternate level |
| 交替级 |
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65. | environmental level |
| 在环境中的浓度; 环境浓度水平 |
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66. | adaptation level |
| 适应电平;适应亮度 |
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67. | irrigation level |
| 灌溉水位 |
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68. | adjustable level |
| 活动水平尺 |
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69. | inspection level |
| 检验水准 |
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70. | amplitude level |
| 振幅级 |
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