On a typewriter, a wheel-shaped type element with types arranged in rows on its circumference. 打字机上的一种轮形打印部件,字模成行地装在轮的圆周上。
In order to reduce the fan speed and increase wind energy utilization start, bold ideas put forward a new structure of the wind wheel-shaped ring wind wheel. 为了降低风机的起动风速以及提高风能利用系数,大胆设想,提出了一种新型结构风轮&聚能环型风轮。