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61. | Focus length |
| 焦点长度 |
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62. | the standard of length |
| 长度标准 |
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63. | file length |
| 文件长度 |
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64. | effective length |
| 有效长度 |
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65. | page length |
| 页面长度 |
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66. | character size |
| 字符长度 |
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67. | traversed length |
| 行程长度 |
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68. | Near field length |
| 近场长度 |
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69. | track circuit length |
| 轨道电路长度 |
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70. | embedded length |
| 嵌入长度 |
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