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lever

lever

top to bottom: first-class, second-class, and third-class levers

The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

A crowbar is an example of a lever.

A crowbar is an example of a lever.

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