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| 61. | life span perspective |
| 毕生发展观 |
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| 62. | multi span structure |
| 多跨结构 |
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| 63. | shorten the span |
| 缩短时间 |
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| 64. | long span culvert |
| 大跨度涵管 |
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| 65. | short span structure |
| 短跨结构 |
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| 66. | life-span determination |
| 寿命测定 |
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| 67. | running memory span |
| 流动记忆范围 |
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| 68. | long span bridge |
| 长跨桥 |
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| 69. | two span bridge |
| 双跨度桥 |
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| 70. | clearance of span |
| 净跨;净跨 |
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