为了开发矿业,加快地质和石油勘探工作速度,德州石油钻探技术研究队和北京砂轮厂协作,从1974年四季度开始,大力开展了低温电铸人造金刚石钻头和扩孔器的研究与试验,经过一年多时间的努力工作和初步生产试验,取得了可喜的进展。 In order to develop the mining industry and speed up the exploration of geology and petroleum, the Texas Petroleum Drilling Technology Research Team cooperated with Beijing Grinding Wheel Factory. From the fourth quarter of 1974, the research and test of low temperature electroforming synthetic diamond drill and reamer have been vigorously carried out. More than a year of hard work and preliminary production tests have made encouraging progress.