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Specifications of Letters Patent for Inventions and Provisional Specifications
其他書名
1879, 2701 - 2800 (1880)
出版
Published and sold at the Commissioners of Patents Sale Departement
, 1880
URL
http://books.google.com.hk/books?id=P9esuEFwyhcC&hl=&source=gbs_api
EBook
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