Densō kairomō oyobi rohaki
By: [kōetsu iin Shinohara Noboru ; shippitsusha Saisho Masayoshi]
Series: Tsūshin kōgaku tsūzoku sōsho -- sono <1   >
Publisher: Denki Tsūshin Gakkai
Published: 1942
Place of publication: Tōkyō
Language: jpn
Subjects: Circuit breakers; Electric circuits