在毛主席无产阶级革命路线指引下,我厂职工以阶级斗争为纲,坚持党的基本路线,发扬敢想敢干、勇于实践的革命精神,经过反复试验,多次摸索,试铸成功并已正式投产各种凿岩机械大型精铸件40余种。 Under the guidance of Chairman Mao’s proletarian revolutionary line, our factory workers have taken the class struggle as the key factor, adhered to the party’s basic line, and carried forward the revolutionary spirit of dare to think and dare to do things, and had the courage to practice. After repeated trials and trials, we tried many times and tried successfully. Formally put into production of more than 40 kinds of large-scale castings for drilling machinery.