请求将被后端接收到，然后回送一个JSON响应文件，其中含有设备请求的数据。
The request will be received by the back end, which in turn will send back a JSON response file containing the requested data to the device.
请求将被后端接收到，然后回送一个JSON响应文件，其中含有设备请求的数据。
The request will be received by the back end, which in turn will send back a JSON response file containing the requested data to the device.
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