Screws

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Screws by Glover, David, 9781403485663
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  • ISBN: 9781403485663 | 1403485666
  • Cover: Hardcover
  • Copyright: 5/15/2006

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How are a boat propeller, water faucet, and spiral staircase alike? How can a screw keep your soda pop from getting flat? How can a screw help you plant a tree? Why might a large wrench work better than a small one? This title shows you how different kinds of these simple machines are all around you to make your work and play easier.