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 wheels and axles, and uses simple language and labeled photographs to explain the scientific principles behind their use.
语言 英语 ● 格式 PDF ● ISBN 9781406249415 ● 出版者 Raintree UK ● 发布时间 2012 ● 下载 6 时 ● 货币 EUR ● ID 5693949 ● 复制保护 Adobe DRM
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