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The Invention Hunters discover how machines work
Book
J 608 BRI
Little, Brown and Company,, 2019.
1 volume (unpaged) : color illustrations ; 23 x 29 cm. 
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About this item:
"When the Invention Hunters, a group of globe-trotting invention collectors, visit a construction site in their flying museum, a boy helps them by explaining how simple machines like levers, pulleys, and cranks work"-- |