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71. | equivalent length |
| 当量长度 |
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72. | length specification |
| 长度说明 |
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73. | extremal length |
| 极值长度 |
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74. | approximate length |
| 近似长度 |
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75. | restrictive length |
| 节流长度 |
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76. | welding bead length |
| 焊缝长度 |
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77. | average duration of life |
| 平均寿命长度 |
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78. | apparent length |
| 表观长度 |
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79. | persistence length |
| 相关长度 |
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80. | anchorage length |
| 锚固长度 |
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