花岗石的

Zhongcheng tools co.,ltd gathered one strong group of technicians and one paseel of workers with profound working experiences,cooperating with the scientific reseach units and universities etc,which make the company own strong capacity to investigate ,develop and produce varities of demond tools with different purposes.the products of the company cover diamond abrasive wheels stone surface shape wheels,irregular stone machining tool.drill head,diamond saw blade,ceramic and diamond tools tec many types,which is mainly suitable for deep machining of granite,marble,concret,fire proof matetials,esphalt,ceramic and glass materials etc .the excellent performance of the products has dot high apraisement of all the domestic and overseas circles.

上海凯锐众成工具有限公司聚积了一支雄厚的技术队伍和一批有丰富工作经验的工人，与科研单位、高级院校合作、具有强大的研究、开发、生产各种不同用途的金刚石工具的能力。公司现有多种产品，金刚石磨轮、石材表面形状轮、异性石材加工工具、钻头、金刚石锯片、陶瓷金刚石工具等、主要用于花岗石、大理石、混凝土、耐火材料、沥青、陶瓷及玻璃材料的深加工中。产品的优越性能，得到国内外的一致好评。在中国每四只磨轮中有一只是本公司生产

And some are caused because the grinding stone the grain grade is not reasonable or not polished so well.

肉眼看来光洁如镜的花岗石石材的表面，在反光显微镜下和扫描电子显微镜下可以看出石材表面都存在在磨抛加工后所留下的凹坑和条痕，这些凹坑和条痕有的是在目前的加工条件下无法克服的由矿物本身的缺陷而造成的，有的则是因为在加工过程中由于磨石粗细等级不合理或磨抛不彻底所造成的。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。