在毛主席革命路线指引下,在批林整风和批林批孔运动的推动下,三年来,我们同搞钻具设计的长沙矿山研究院同志在一起,沿着毛主席所指出的三结合道路,深入制造钻具的工厂,使用钻具的矿山,虚心地向工人请教,认真地做调查研究,反复地进行现场试验,逐步地摸索出来一些对潜孔钻具的材质要求,提高了冲击器的工作寿命,目前,平均寿命已达3700米以上,最高寿命5000～6000米,推动了潜孔钻具转产工作。 Under the guidance of Chairman Mao’s revolutionary line and under the impetus of the rectification and reorganization of forests and the criticism and approval of the bore holes and boredom movements, in the past three years we worked with comrades from the Changsha Mining Research Institute who engaged in the design of drilling tools. Along the road of the triple combination pointed out by Chairman Mao, , In-depth manufacturing of drilling tools factories, the use of drill mines, humbly ask the workers to do a careful investigation and research, repeated field trials, and gradually developed some of the material requirements for down-hole drilling tools to improve the impactor Of the working life, at present, the average life expectancy has reached more than 3700 meters, the highest life expectancy of 5000 ~ 6000 meters, to promote the conversion of DTH drilling work.