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A Brief History of Abrasive Technology 磨料技术的简要历史 It is difficult to say when abrasive technology had a beginning. Abrasive were used by man many thousands of years before he learned to write. Primitive man used abrasives for the sharpening of tools of wood, bone or flint. Later in the period preceding the invention of pottery abrasives were used for grinding out stones to make bowls and dishes. 这是很难说，当磨料技术有一个开始。在他学会写字之前，磨粒被人用了几千年。原始人用磨料磨具木，骨或燧石。在这一时期，陶器的发明之前，被用来研磨石头，使碗和盘子。 Abrasives were, and still are, used by other forms of life, by birds for the sharpening of beaks, and by some species of antlered animals for the sharpening of their horns. 磨料磨具，还是，其他形式的生命，鸟类喙的锐化，用鹿角有一些动物的角的锐化。 The beginning of the science of abrasives, however, may be taken as that time when man began to select certain rocks for their peculiar properties, and to fashion these into tools for grinding. The earliest record of such activity comes to us from Egypt. Evidence collected there indicates that stones were being sawed by some crude sort of grinding machine as early as 4000 B.C. 然而，科学开始的磨料，可能会采取的时候，人开始选择某些岩石，其独特的性能，并将这些工具用于磨削。电针rliest记录这样的活动来自于埃及。收集到的证据表明，有石头被锯的研磨机的一些简陋早在公元前4000年 The real blossoming of the abrasive industry coincided with the beginnings of metallurgy which took place in the near and middle east about 2000 B.C. Abrasives then became a necessity of life and their development has kept pace with the demands of metallurgy from that time until the present day. 真正的朵朵的磨料行业冶金发生在近东和中东地区公元前2000年左右，磨料就生活和他们开始一致的必要性随着冶金的需求，从那时到现在的发展。 The earliest record of the use of abrasives for the grinding of metal also comes to us from Egypt. A steel dagger was found there along with a sharpening stone, which has been dated at about 1500 B.C. 对金属的研磨用磨料的最早的记录也来自埃及的我们。一把匕首，在那里发现了一块石头，大约在公元前1500年的时间里被发现了 During the following centuries the technique was developed for fashioning grinding wheels from natural sandstones. These were turned by hand at first, but by the 14th century water wheels were being use