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湖南冶金局、机械局和贵州冶金局受冶金部、一机部的委托,于1980年9月23～26日在湖南湘东钨矿主持召开了YYG-80液压凿岩机、CGJ-2Y凿岩台车和B25YY钎杆技术鉴定会。来自全国各地有关的62个单位,122名代表出席了这次会议。由液压凿岩机、台车以及与其配套的钎杆组成的这套全液压设备,从1973年开始研制,经过八年的努力,现已成功。到1980年8月止,累计穿孔31100米,掘进成巷662米。达到了1978年召开的
Commissioned by the Ministry of Metallurgy and Machinery Department of Hunan Metallurgical Bureau, Bureau of Machinery and Guizhou Metallurgical Bureau, YYG-80 hydraulic rock drill and CGJ-2Y rock drill station were held at Xiangdong Tungsten Mine in Hunan on September 23-26, 1980. Car and B25YY rod technology appraisal meeting. 62 units from all over the country and 122 representatives attended the conference. The hydraulic equipment, consisting of hydraulic rock drills, trolleys and their matching rods, has been developed since 1973 and has been successfully completed after eight years of hard work. Until August 1980, a total of 31,100 meters perforation, tunneling into an alley 662 meters. Reached in 1978 convened