Economic situation It will be based on income level to the economic choice is to buy the socks and underwear or high-grade products. 人们会根据收入的高低来选择是买经济型的还是高档的袜子和内衣产品。
The ellipse interpolation which is suitable for the economic NC machine is proposed in the paper based on the circular arcs interpolation. 摘要在圆弧逐点比较插补算法的基础上提出了一种适用于经济型数控机床的椭圆逐点比较插补算法。
