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大型潜孔钻机在露天穿孔中的应用,是无产阶级文化大革命的一项丰硕成果。潜孔钻机投产后,由于钻头供应困难,使钻机不能在生产上充分发挥作用。为了解决这个问题,自1972年3月以来,我们遵照毛主席“独立自主,自力更生”,“破除迷信,解放思想”的伟大教导,在矿山党委的直接领导下,大搞群众运动,工人、干部和技术人员(教师)三结合,以铁代钢、以铸代锻,试制了稀土镁球墨铸铁柱齿钻头(简称球铁
The application of large-scale down-hole drilling rigs in perforation in the open air is a fruitful achievement of the Great Proletarian Cultural Revolution. DTH drilling rig put into operation, due to the drill bit supply difficulties, so that drilling can not fully play its role in production. In order to solve this problem, since March 1972, following the great teachings of Chairman Mao “independent and self-reliance” and “breaking superstition and emancipating the mind,” we have conducted a series of activities under the direct leadership of the mine party committees, such as mass movements, workers and cadres Technician (teacher) three combination of iron and steel to cast forging, trial production of rare earth magnesium nodular cast iron column teeth (referred to as ductile iron