机器的高精度和高速度,是近代化机械工业发展的 重要条件。但是,只有当磨料和磨具的质量、数量和品种得 到较完善的发展;磨削工艺水平也得到相应提高的时候, 机械工业才有可能高速的发展。众所周知,倘若磨料、 磨具的质量和数量不能满足需要,我们的轴承工厂就将 有60%的加工工? The high precision and high speed of the machine are important conditions for the development of the modernization of the machinery industry. However, it is only when the quality, quantity, and variety of abrasives and grinding tools are relatively well-developed; the level of grinding technology has also been correspondingly increased, and the machinery industry is likely to develop at a high speed. As we all know, if the quality and quantity of abrasives and grinding tools do not meet our needs, our bearing factory will have 60% of the processing workers.