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A Process of Rotary Field Induction Motor Calculation with Kapp’s Clock-diagram
Source materials for Engineering History: The University of Tokyo Digital Archive
Report of Third Year Excursion [Kobe Electric Lighting Co.]
Source materials for Engineering History: The University of Tokyo Digital Archive
電気(作文)〕
Yuzuru Hiraga Digital Archive
小学生徒日課表
Yuzuru Hiraga Digital Archive
証(品行方正学術勉励)
Yuzuru Hiraga Digital Archive