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The Globotype Telegraph: a Recording Instrument, by which Small Coloured Balls are Released One by One, and Made to Pass Over a Series of Inclined Planes, by the Force of Their Own Gravity
David McCallum
出版Longman, Brown, Green, and Longmans, 1856
URLhttp://books.google.com.hk/books?id=PTJkAAAAcAAJ&hl=&source=gbs_api
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