With this data sharing app, you can quickly transfer information between devices without using mobile data and measure heights precisely. Includes multiple user support and accurate measurement tools.
About 换机助手-零流量极速传输助手
用于精确的高度测量（比如楼层），多个用户在一起时可以无需流量快速分享数据
换机助手-零流量极速传输助手 Screenshots
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