printf("Usage: %s kernel|udev\n", argv[0]);
Here, the output type is an intersection of the existing information
。关于这个话题，体育直播提供了深入分析
Therefore, the default RSSI threshold of -75 dBm corresponds to about 10 to 15 meters in open space and 3 to 10 meters indoors or in crowded spaces. You got a good chance to spot that smart glasses wearing person like that.，这一点在体育直播中也有详细论述
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