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📖 Description
''A foundational look at levers, explaining how these simple machines work and describing some common examples, such as crowbars, that have been used throughout history''--Provided by publisher. Title: Levers Author: Bodden, Valerie Publisher: Chronicle Books Llc Publication Date: 2011/02/02 Number of Pages: 23 Binding Type: PAPERBACK Library of Congress: 2010021968