Do you know what a lever is? How can a lever help you? Through simple experiments and clear explanations, understand how this simple machine functions and how it can make the work that you do easier.
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语言 英语 ● 格式 PDF ● ISBN 9780822500643 ● 出版者 Lerner Publishing Group ● 发布时间 2001 ● 下载 3 时 ● 货币 EUR ● ID 4743435 ● 复制保护 Adobe DRM
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