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为了提高磨削效率,解决难磨材料的磨加工问题,我们在毛主席无产阶级革命路线指引下,遵照“打破洋框框,走自己工业发展道路”的教导和生产、使用、科研三结合的方针,利用我国丰富的稀土资源,研制成功一种国外没有的新型磨料——错钕刚玉,代号GP(在中间试验阶段,曾暂名新刚玉,代号GX)。镨钕刚玉是1972年在实验室试制成功的。1973年以实验室产品,在使用厂反复进行磨削工件的试验,证明此种新磨料在磨削某些材料方面有其独特的性能。1974年转入中间试验,在第一、第二砂轮厂以工厂规模小批试制,同时扩大磨削使用范围。经过1973年——1974年
In order to improve the grinding efficiency and solve the problem of grinding hard materials, under the guidance of Chairman Mao’s proletarian revolutionary line, following the guideline of “breaking the framework of the world and taking the path of industrial development”, and combining the production, use and scientific research , The use of China’s abundant rare earth resources, the successful development of a new type of foreign Abrasives - the wrong neodymium corundum, code-named GP (in the pilot phase, once tentatively new corundum, code-named GX). Praseodymium neodymium was successfully produced in a laboratory in 1972. Repeated grinding of workpieces with laboratory products in 1973 was tested to demonstrate that this new abrasive has unique properties for grinding certain materials. In 1974 into the intermediate test, in the first and second grinding plant factory small scale trial production, while expanding the use of grinding range. After 1973 - 1974