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This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.
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W. Parker
Principles of Mechanism: Designed for the Use of Students in the Universities and for Engineering Students Generally
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This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
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Willis Fig 018 Rolling principlesmecha02willgoog 0082 (c).jpg
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Willis_Fig_018_Rolling_principlesmecha02willgoog_0082_(c).jpg
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https://archive.org/details/principlesmecha02willgoog
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