振動型呼出信号及信号音発生器
The Institute of Teregraph and Telephone Engineers of Japan
Vol.16 No.2 pp.132-135
Publication Date:1932/02/01
Online ISSN:2188-2355
Print ISSN:0913-5693
Type of Manuscript:学界近情
Category:
Keyword:
---
Full Text:PDF(191.4KB)>>
Summary: