From a graphite core to a metal ferrule that holds the eraser in place, pencils are simple but ingenious tools. Every part of a pencil serves a key role in letting students write, draw, and erase. This narrative shows readers how flat slats of wood are transformed into writing implements used in schools each day.
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语言 英语 ● 格式 PDF ● 网页 24 ● ISBN 9781502647016 ● 出版者 Cavendish Square Publishing, LLC ● 发布时间 2019 ● 下载 3 时 ● 货币 EUR ● ID 7131177 ● 复制保护 Adobe DRM
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