Summary

私設電話の具備すべき条件等の発布

The Institute of Teregraph and Telephone Engineers of Japan 

Vol.11 No.11 pp.732-732

Publication Date:1927/11/01

Online ISSN:2188-2355

Print ISSN:0913-5693

Type of Manuscript:Miscellaneous notes

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Online ISSN:2188-2355