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| 71. | bridge mathematics |
| 桥牌中的数学 |
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| 72. | bridge collapse |
| 桥塌了 |
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| 73. | bridge connection |
| 桥式接线|桥接 |
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| 74. | bridge resistance |
| 桥路电阻 |
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| 75. | bridge excavation |
| 桥基开挖 |
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| 76. | bridge instrumentation |
| 驾驶室仪表 |
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| 77. | bridge extension |
| 桥楼伸展平台 |
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| 78. | bridge mechanics |
| 桥梁力学 |
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| 79. | bridge framework |
| 桥梁构架 |
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| 80. | bridge telegraph |
| 桥楼传令钟 |
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