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Road map, contains holes in locations of cities for reading distances between cities printed on retractable page inside
Road map, contains holes in locations of cities for reading distances between cities printed on retractable page inside
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机译:路线图,在城市位置包含孔,以读取打印在可伸缩页面上的城市之间的距离
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摘要
Small holes are provided in the locations of cities or other points of interest on the map. Inside the map is a retractable page with numbers printed on it which correspond to the distances between these cities or points of interest and which can be read via the holes when the map is completely inserted.
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