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Levers to the Rescue (First Facts: Simple Machines to the Rescue)
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Amazon.com Product Description (ISBN 0736867473, Library Binding)From rakes and brooms to bats and hockey sticks, you use levers to work and play. Read Levers to the Rescue to learn what levers are, how they work, and how these simple machines can save the day.
(retrieved from Amazon Thu, 12 Mar 2015 18:09:34 -0400)
"Describes levers, including what they are, how they work, past uses, and common uses of these simple machines today"--Provided by publisher.
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