Precision machining, not all materials can be precision machined. If the hardness of some materials is too high and exceeds the hardness of the machined parts, the parts may collapse. Therefore, these materials are not suitable for precision machining, unless they are made of special materials or laser cutting. Dalian precision machining technology is the key technology of advanced equipment manufacturing. If a country's industrial precision machining technology is advanced, the country's manufacturing equipment manufacturing industry will also be very good. In the past, due to the backward processing technology and equipment of precision parts in China, it was impossible to process precision parts with small diameter, high precision and complex surface shape, which seriously affected the technological progress in relevant fields in China. However, with the influx of foreign capital and the intensification of work competition, domestic mechanical parts processing has increased investment in independent development, and has achieved infinite results. In particular, the mechanical measuring tool and measuring instrument production company has completed a breakthrough in digital display skills and digital display hardware measuring tool commodities.