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The invention provides a method of decreasing big pattern hollow during metal and polysilicon chemical and mechanical rubbing, it mainly uses photoetching and etching technique, combining decorated chemical and mechanical rubbing method, avoids big pattern hollow when metal and polysilicon is rubbed.

本发明提供一种在金属和多晶硅化学机械研磨中减少大图案凹陷的方法,主要通过以光刻和蚀刻技术结合修饰性化学机械研磨的方法,避免对大图案的金属或者多晶硅进行研磨时出现过度凹陷。

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。