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Search - Cranes, Dump Trucks, Bulldozers and Other Building Machines (How Things Work)
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Cranes Dump Trucks Bulldozers and Other Building Machines - How Things Work Author: Here's a lively look at large building machines. It discusses how roads are made, shows how levers and pulleys help us move heavy loads, explains what a cement mixer has to do with Archimedes, and much more.
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