描述
Screws are simple machines used for many different jobs. The concept of a screw is used in snow blowers, drills, and presses. Kids will learn how screws work and how they are used in complex machines.
书籍详情
格式
平装书
页数
24 页
语言
英语
已发布
8月 1, 2009
出版商
Bellwether Media
版本
2 个版本
ISBN-10
1600143229
ISBN-13
9781600143229