The story of tools: how they built our world and shaped man's life

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Norton, 1969 - House & Home - 150 pages
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Explains how man has achieved all the mechanical advances he knows through the use of five simple machines--lever, wheel and axle, pulley, screw, wedge, and plane.

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Contents

Section 1
3
Section 2
27
Section 3
34

7 other sections not shown

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