任何一台机械产品都有它特定的功能,而每一个功能往往可以用多种方法加以实现,也就是说,可以用各种各样的原理及结构去实现同一功能,这就存在着设计方案的选择问题,要作出正确的选择,必须对各种设计方案在技术和经济等方面进行全面的评价。设计方案的评价将是设计师们作出正确 Any mechanical product has its own specific function, and each function can often be implemented in many ways. In other words, a variety of principles and structures can be used to realize the same function. There is a design plan The choice of the problem, to make the right choice, must be a variety of design options in the technical and economic aspects of a comprehensive evaluation. The evaluation of the design proposal will be made by the designers