求翻译：设计台式电风扇的摇头装置要求能左右摇转并可调节俯仰角。以实现一个动力下扇叶旋转和摇头动作的联合运动效果。本文分析了台式电风扇的摇头装置设计任务及结构工艺特点，介绍了工作过程，工作原理，阐述了功能分解，机构选用，离合器的选用，机构设计，传动方案设计及相关计算等。是什么意思？

Design desktop electric fans shaking device requires adjusting the yaw and pitch angle. In order to achieve a dynamic movement of the fan blades rotate and shake action under effects. This paper analyzes desktop fans shaking device design tasks and technical features of the structure, describes the work process, how it works, and elaborated functional decomposition, agency selection, selection of the clutch, mechanism design, transmission design and related calculations.