What Are Screws?

Screws hold objects together.” Clear, concise text, easy-to understand graphics, and dynamic photos with labels help early readers grasp basic mechanical concepts. Real world examples of simple machines at work. Includes glossary, index, and further resources. Paperback, 24 pages. Ages 4 to 8.
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SC262 What Are Screws? NOT AVAILABLE
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What Are Screws?

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