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Simple Machines (Let's-Read-and-Find-Out Science 2)
Heavy Machinery - Simple Machines (Let's-Read-and-Find-Out Science 2)
10 Little Construction Trucks (10 Little Vehicles)
Heavy Machinery - 10 Little Construction Trucks (10 Little Vehicles)
The World's Dirtiest Machines (Extreme Machines)
Heavy Machinery - The World's Dirtiest Machines (Extreme Machines)
Heavy Machinery - See Inside How Things Work: A Usborne Flap Book Revealing Car Engines, Submarines, and Machines for Kids (Ages 6-9)
