名词
中文翻译：Unknown
同义词：
['range selector', 'range meter', 'range transformer']
例句：
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1. The range converter is used to measure the distance between two points on a map.
范围转换器用于测量地图上两点之间的距离。
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2. The range converter was designed to simplify the process of measuring distances.
范围转换器的设计是为了简化测量距离的过程。
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3. The range converter was used to adjust the focus of the camera lens.
范围转换器被用来调整相机镜头的焦点。