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Circuit-changer for Latent-signal Transmission
Felix Benedict Herzog
其他書名
Specification Forming Part of Letters Patent No. 314,294, Dated March 24, 1885
出版N. Peters, Phot-Lithographer, 1885
URLhttp://books.google.com.hk/books?id=9YSiQwAACAAJ&hl=&source=gbs_api