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Gill's Machinery Improved, Its Friction Reduced, Its Powers Increased, and Its Durability Promoted

其他書名	Being the First in the Series of 'Gill's Scientific Treatises'.
出版	publisher not identified, 1839
URL	http://books.google.com.hk/books?id=vkHQYgEACAAJ&hl=&source=gbs_api