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| 水平视线距离 | |||
| 水平〔视线〕距离 | |||
| 水平距离; 视线距离; 测者视地平距离 | |||
| 直视距离; 视距范围 | |||
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horizon range : 2 phrases in 2 subjects |
| Electronics | 1 |
| Technology | 1 |
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