Gears - Simple Machines
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gear 6_3.gif (488×349) Chapter, Gears, Simple machines
[Glover, David] on . *FREE* shipping on qualifying offers. Pulleys And Gears (Simple Machines)
Pulleys And Gears (Simple Machines)
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This model is composed of three identical wooden gears mounted on a base with a hand turn crank. It is made from sturdy wooden construction and is
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