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| 71. | a memory [attention] span |
| 记忆 [注意力] 持续的期间[时间] |
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| 72. | adjustable-span recorder |
| 可调间隔记录器 |
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| 73. | organizational span of control |
| 控制的组织幅度 |
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| 74. | life span of oil |
| 油使用期限 |
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| 75. | a long-span bridge |
| 大跨径桥 |
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| 76. | long span steel framing |
| 大跨钢构架 |
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| 77. | mast head span block |
| 上千斤滑车 |
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| 78. | Life expectancy; Life span |
| 预期寿命 |
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| 79. | mid-span shrouded blade |
| 凸扇叶片 |
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| 80. | Large-Span House structure |
| 大跨度房屋结构 |
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