Summary

昭和二年度に開始さるべき電話自動交換局

The Institute of Teregraph and Telephone Engineers of Japan 

Vol.11 No.5 pp.415-416

Publication Date:1927/05/01

Online ISSN:2188-2355

Print ISSN:0913-5693

Type of Manuscript:Miscellaneous notes

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Online ISSN:2188-2355