在毛主席革命路线指引下,在深入学习无产阶级专政理论的高潮中,人造金刚石微粉精磨丸片用于加工光学玻璃又取得了可喜的进展。我厂与郑州磨料所等单位分别于75年三月底至四月中、六月底至七月中,在北京照相机厂用人造金刚石精磨丸片对该厂照相机中所有牌号玻璃(K_9、F_1、QF_(14)、ZK_(11)、ZBaF_(16))进行了两轮试验,取得了较为满意的结果。过去 Under the guidance of Chairman Mao’s revolutionary line and in the height of in-depth study of the theory of the dictatorship of the proletariat, the progress made in using artificial diamond fine powder grinding pellets for processing optical glass has also made encouraging progress. Our factory and Zhengzhou abrasive and other units respectively from the end of March to mid-April to the middle of June to mid-July of 1975, using artificial diamond fine grinding pellets on the factory of all kinds of glass (K_9, F_1, QF_ (14), ZK_ (11), ZBaF_ (16)) were tested in two rounds and satisfactory results were obtained. past