冶金部与重工业工会联合组织的千米钻技术观摩表演队,于三月上半月在山东冶金厅矿山公司第三勘探队试用合金、钻粒及钢粒并不同钻进方法,进行技术观摩表演,取得了良好的效果。受到了广大职工的热烈欢迎。该队台班效率在原基础上提高72～369%,其中以钢粒钻进的效果最为显著。 Ministry of Metallurgy and heavy industry unions organized by the KM drill technology demonstration team, in the first half of March in Shandong Metallurgical Mining Company third exploration team trial alloy, drill and steel and different drilling methods, technical performances show, got a good result. By the majority of workers a warm welcome. The efficiency of the squad has been increased by 72-369% on the original basis, of which drilling with steel pellets has the most significant effect.