電話用磁石電鈴の感度と其耐久磁石の磁力に就て
杉浦宏俊 三好良正
Vol.19 No.5 pp.448-454
Publication Date:1935/05/01
Online ISSN:2188-2355
Print ISSN:0913-5693
Type of Manuscript:Contribution
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Keyword:---
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