Of the six simple machines, the wheel and axle is probably the most recognized. But how does it help you work? Simple and fun experiments illustrate the basic concepts explained in the text to show you just how easy work can be.
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语言 英语 ● 格式 PDF ● ISBN 9780822504009 ● 出版者 Lerner Publishing Group ● 发布时间 2001 ● 下载 3 时 ● 货币 EUR ● ID 4743438 ● 复制保护 Adobe DRM
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