
Ramps, screws, wheels, pulleys, wedges and levers are all simple machines. Learn about what these machines are and what makes them work. Also find out how to spot machines in action all around you!
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语言 英语 ● 格式 PDF ● ISBN 9781474731744 ● 出版者 Capstone Global Library ● 发布时间 2017 ● 下载 3 时 ● 货币 EUR ● ID 7042862 ● 复制保护 Adobe DRM
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