J_Num_Site_FIG21

グラフ：NTT DOCOMO基地局数（通信方式世代および周波数毎） Graph: Number of NTT DOCOMO base stations (by System generation and frequency band)

Webページ用画像：Posted in Teppei Log (https://teppeilog.com/)
Prepared by Teppei Nagumo　(南雲鉄平)

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