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81. | homocentric beam |
| 同心光束 |
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82. | foundation beam |
| 基座梁 |
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83. | extensional beam |
| 外伸梁 |
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84. | beam candlepower |
| 射束烛光 |
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85. | extraordinary beam |
| 非常光线 |
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86. | stabilizing beam |
| 梭梁 |
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87. | asymmetrical beam |
| 非对称光 |
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88. | beam attenuator |
| 光束衰减器 |
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89. | restrained beam |
| 约束梁,钳制梁 |
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90. | beam communication |
| 定向通信 |
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