在毛主席的无产阶级革命路线指引下,在批林整风运动的推动下,我厂广大职工遵照毛主席关于“中国人民有志气,有能力,一定要在不远的将来,赶上和超过世界先进水平”的教导,发扬“自力更生,艰苦奋斗,破除迷信,解放思想”的革命精神,根据国家建设的急切需要,因地制宜,就地取材,进行了高中压球墨铸铁管的科学实验。经过反复实践,克 Under the guidance of Chairman Mao’s proletarian revolutionary line and with the proactive campaign of rectifying forests and rectifying the wind, the vast majority of our factory workers follow Chairman Mao’s call on “the Chinese people have ambition and ability to catch up with and surpass the world in the near future Advanced level ”and carry forward the revolutionary spirit of“ self-reliance, hard work, superstitious belief and emancipation of the mind ”, conducted scientific experiments of high and medium pressure ductile iron pipe according to the urgent needs of national construction, according to local conditions, and drawing on the spot. After repeated practice, grams