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How Machines Work

Publisher: QEB

How Machines Work

Explore the science behind simple machines and mechanisms - from levers, gears, and pulleys to ratchets, cams, and cranks. Then...

BND 24.90

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Super Structures

Publisher: QEB

Super Structures

What makes an arch strong? Why are long bridges hung from cables? How do towers stand so high? Discover the...

BND 35.90