Summary

日本電信電話公社（概観・電話交換・線路・搬送・無線・電信・通信用電源）国際電信電話株式会社，日本放送協会，日本国有鉄道

The Institute of Electrical Communication Engineers of Japan 

Vol.39 No.1 pp.50-84

Publication Date:1956/01/01

Online ISSN:2188-2355

Print ISSN:0913-5693

Type of Manuscript:電気通信事業の展望

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Online ISSN:2188-2355