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81. | commemorative envelope |
| 纪念封 |
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82. | stapled envelope |
| 钉针封 |
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83. | envelope antigen |
| 包膜抗原,包被抗原 |
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84. | signal envelope |
| 信号包络 |
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85. | envelope function |
| 包络函数 |
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86. | envelope airship |
| 飞船蒙皮 |
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87. | velocity envelope |
| 限速标准 |
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88. | envelope cancellatio |
| 包络补偿 |
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89. | polychrist envelope |
| 明信片式信封 |
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90. | envelope glycoprotei |
| 包膜糖蛋白 |
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