In late December 1991, China Equipment Management Association held an exchange meeting on the technical transformation of CNC machine tools and localization of spare parts in Xi'an. A total of 72 people from 16 provinces and cities nationwide participated. Published 25 papers. Learn from each other through exchanges, learn from each other's strengths, and jointly explore ways to improve the integrity and utilization of CNC machine tools and create more economic benefits. China's development of numerical control technology began in 1958, now has more than 1500 the country has
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