Pull, Lift, and Lower: A Book about Pulleys
| 作者 | Michael Dahl |
|---|---|
| 出版社 | Ingram International Inc |
| 商品描述 | Pull, Lift, and Lower: A Book about Pulleys:Introduceyoungscientiststothebasicsofpulleys.Throughcharmingillustrationsandsimple,easy-to-followtext,thisnonfictio |