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Screws, Nuts, and Bolts (How Toys Work) Sian Smith
Screws, Nuts, and Bolts (How Toys Work)
Sian Smith
Each book in this series focuses on a type of simple mechanism and examines how it is used to make different toys work. This book examines screws, nuts, and bolts, and uses simple language and labeled photographs to explain the scientific principles behind their use.
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