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Pull, Lift, and Lower: A Book...
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Hubble Space Telescope:...
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Meteorologists Tools
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Hauling a Pumpkin: Wheels and...
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A Hole in the Road
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Fracking
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How Do You Lift a Lion?
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Humvees
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Tanks
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Inside Fighter Planes
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How Is a Bandage Like a Worm?...
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Inventions: That Could Have...
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Farm Machinery
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Ramps and Wedges
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