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2022-07-25 19:25:00 【zterrorblade】
GSM 2G gprs 2.5G EDGE 2.75G
4g 中 NBIOT:cat.M2 lte cat.1 lte cat4 区别对比


参考
https://blog.csdn.net/AmazIOT/article/details/105159757
https://www.elecfans.com/iot/1209809.html
lte 4g lte-a 区别
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