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  1. zhihu.com
    https://www.zhihu.com/question/347121248

    GSM是什么意思？干什么的？ - 知乎

  2. zhihu.com
    https://www.zhihu.com/question/361987168

    什么是「全球移动通信系统（GSM）」，该系 ... - 知乎

  3. zhihu.com
    https://www.zhihu.com/topic/19598815/top-answers

    gsm - 知乎

  4. zhihu.com
    https://www.zhihu.com/question/20459837

    WCDMA/GSM 是什么意思？ - 知乎

  5. zhihu.com
    https://www.zhihu.com/topic/20657144/intro

    GSM系统 - 知乎

  6. zhihu.com
    https://www.zhihu.com/question/26463096

    GSM中每个用户占用带宽是200khz，还是25khz? - 知乎

  7. zhihu.com
    https://www.zhihu.com/question/46780206

    gsm系统中gmsk是调频还是调相？ - 知乎

  8. zhihu.com
    https://www.zhihu.com/question/19812707

    GSM大概何时停用？ - 知乎

  9. zhihu.com
    https://www.zhihu.com/question/28095144

    中国GSM会在何时关闭？ - 知乎

  10. zhihu.com
    https://www.zhihu.com/question/22270419

    对GSM收发模块的一些疑问？ - 知乎