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並前往https://books.google.com.tw/books?id=ZhRLAQAAMAAJ&pg=PR59-IA7&lpg=PR59-IA7&dq=feb+8&source=bl&ots=aJzeQEfmrQ&sig=ACfU3U3bOnCGNksYbgylqUPPEMtnjuAkZw&hl=zh-TW&sa=X&ved=2ahUKEwjcz56c-sT2AhUkTDABHTAQCH4Q6AF6BQjAAhAD

Official Gazette of the United States Patent Office

1,369,509 ; Feb. 22 ; v . 283 ; p . 656 . Derailing device . C. E. Zortman . No. 1,368,008 ; Feb. 8 ; v . 283 ; p . 277 . Derrick . O. E. Hovey . No.

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