A new method for fabricating micro - optical elements with aspherical outlines is discussed.讨论了一种制作非球面微光学元件的新方法.This paper presents the design principle and method of an opticalfor plastic aspherical door scope.介绍了一种塑料非球...
An army of buyers haggles furiously with an army of salesmen.一大群买主在和卖主拼命地讨价还价.Prospective buyers should study the small ads in the daily newspaper.打算购物的人应该研究研究日报上的小广告。Buyers came from all corners of the world...买主来自世界各地。...