a type of toy motor commonly found in toy cars and other vehicles, where the motion of the toy is generated by the friction between the wheels and the surface it moves on, without the need for batteries or external power sources
文法情報
有生性の状態
無生物
形態的構成
複合語
可算
複数形
friction motors
例
The friction motor in this robot makes it move across the table without needing batteries.
