该项目是由设计者通过仔细观察 ,大胆思考 ,加之指导老师精心辅导而设计出的 ,具有很强的新颖性、创造性、实用性。首先 ,该设计充分利用了天平的平衡原理 ,利用一些简单的电路及构造 ,解决了称取定量粉末药品工序繁杂费力的问题。在这一方面 ,属于首创。其次 ,设计者模仿筛选 The project is designed by the designer through careful observation, bold thinking, and the guidance of the instructor carefully, with strong novelty, creativity and practicality. First of all, the design takes full advantage of the balance principle of the balance, and utilizes some simple circuits and structures to solve the problem of complicated and complicated processes of weighing quantitative powder medicines. In this regard, is the first. Second, the designer imitates the screening