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| 71. | height envelope |
| 限高标准 |
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| 72. | amplitude envelope |
| 振幅包络 |
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| | |
| 73. | railway envelope |
| 铁路边缘地；铁路结构界限线；铁路占用空间 |
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| | |
| 74. | peripheral envelope |
| 周包膜 |
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| | |
| 75. | adhesive envelope |
| 有胶口信封 |
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| | |
| 76. | nonuniform envelope |
| 非均匀包络 |
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| 77. | flight envelope |
| 飞行包线 |
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| | |
| 78. | nuclear envelope |
| 核被膜，核包膜 |
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| | |
| 79. | building envelope |
| 建筑物外壳 |
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| | |
| 80. | operating envelope |
| 作业范围 |
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