この商品を友人に教える:
Ramps and Wedges (How Toys Work) Sian Smith
Ramps and Wedges (How Toys Work)
Sian Smith
Each book in this series focuses on a type of simple mechanism and examines how it is used to make different toys work. This book examines ramps and wedges, and uses simple language and labeled photographs to explain the scientific principles behind their use.
![Cover for Robert E Probst · Notice and Note Literature Log (Spiral Book) [Csm Spi Wk edition] (2013)](https://imusic.b-cdn.net/images/item/original/661/9780325056661.jpg?robert-e-probst-2013-notice-and-note-literature-log-spiral-book&class=scaled&v=1410153941)
