Summary

北京自動式電話交換装置の工事に就て

小菅菊夫 岩田治一 大場武夫 

Vol.24 No.12 pp.704-714

Publication Date:1940/12/01

Online ISSN:2188-2355

Print ISSN:0913-5693

Type of Manuscript:論文欄

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Online ISSN:2188-2355