File:Six Mechanical Powers.png

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Summary

Description
English: The six simple machines.
Date
Source The American educator; completely remodelled and rewritten from original text of the New practical reference library, with new plans and additional material (1919), Vol. 5, pg. 2290.
Author Foster, Ellsworth D., ed; Hughes, James L. (James Laughlin)

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Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.

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Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Six_Mechanical_Powers.png

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31 December 1919Gregorian

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current03:31, 10 April 2017Thumbnail for version as of 03:31, 10 April 20171,005 × 915 (149 KB)OksmithUser created page with UploadWizard

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