obstacle clearance height (OCH) 障碍许可高度 obstacle clearance limit (OCL) 障碍许可限度 obstacle clearance surface (OCS) 障碍许可面 ..
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OCL Obstacle Clearance Limit 越障限制
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Map of airport clearance limit and obstacle location serves as a special one to understand and promote the relation between clearance limits and obstacles.
机场净空限制面及障碍物位置图，是了解掌握限制面和障碍物关系的专业地图。
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