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What Are Pulleys?

A simple machine book

People use pulleys to life heavy loads.
Real world examples of pulleys at work. Clear, concise text, easy-to understand graphics, and dynamic photos with labels help early readers grasp basic mechanical concepts. Includes glossary, index, and further resources. Paperback, 24 pages. Ages 4 - 8.
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SC261 What Are Pulleys? NOT AVAILABLE
Made in USA
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What Are Pulleys?

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