我厂挖掘机所用产品零件,多年以来,一直采用铸件和锻件。在毛主席无产阶级革命路线指引下,于1970年开始搞起了熔模精密铸造这项新技术。几年来产品品种逐步扩大,产品产量不断提高,精铸件重量由0.3公斤增加到0.6公斤,品种由几种增加到近百种。 I used excavator products factory parts, for many years, has been the use of castings and forgings. Under the guidance of Chairman Mao’s proletarian revolutionary line, the new technology of investment casting was started in 1970. Over the past few years the product variety gradually expanded, product output continues to increase, precision castings weight increased from 0.3 kg to 0.6 kg, the variety from several to nearly a hundred species.