Summary

直列複式交換機市外中継座席に於ける市内通話中断取扱方法の改良に就て

桜井喜三郎 

Vol.7 No.3 pp.155-157

Publication Date:1923/03/01

Online ISSN:2188-2355

Print ISSN:0913-5693

Type of Manuscript:Contribution

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Online ISSN:2188-2355