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81. | least distance of distinct vision |
| 明视最短距离;明视最小距离 |
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82. | Night visibility |
| 夜间显示距离|夜间了望距离 |
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83. | range-azimuth indicator |
| 距离-方位显示器;距离-方位显示器 |
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84. | lacking visibility |
| 显示距离不足|了望距离不足 |
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85. | range-azimuth tube |
| 距离-方位管;距离-方位管 |
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86. | range-elevation display |
| 距离-仰角显示器;距离-仰角显示器 |
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87. | range-range positioning |
| 圆-圆定位,距离-距离定位 |
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88. | geometric distance model |
| 几何距离模式几何距离模式 |
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89. | range mark offset |
| 距离标志偏移;距离标志偏移 |
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90. | distance impedance protection |
| 距离阻抗保护;距离阻抗保护 |
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