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What do Levers do? (Cased) - Hardcover

Glover, David

 
9780431062686: What do Levers do? (Cased)

Inhaltsangabe

Part of a series which aims to develop children's knowledge of the basic principles of design and technology. Each book introduces a particular principle and explores how it is used in different gadgets and machines. This book looks at levers.

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