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Springs

Siân Smith, Siân Smith

出版社：Raintree

出版时间：

ISBN：9781406238020

词汇量：

页数：24

类别：

虚构：

开本：

阅读年龄：

作者简介

内容简介

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 springs and uses simple language and labelled photographs to explain the scientific principles behind their use.

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