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在华主席抓纲治国英明决策指引下,冶金部于1978年11月25日至12月1日,在湖南瑶岗仙钨矿召开了TYZ—500型天井牙轮钻机技术鉴定会。参加会议的有科研、设计、大专院校、工厂、矿山等52个单位的82名代表。冶金部、湖南冶金局和郴州地区冶金局有关业务部门的领导主持和参加了鉴定会。一机部的有关公司和企业派人到会指导。与会代表认真听取了长沙矿山研究院,瑶岗仙钨矿、下垄钨矿、水口山铅锌矿关于天井牙轮钻机与钻具的设计、工业试验和使用情况的介绍,参观
Under the guidance of China’s wise policy of grasping the country by the State Council, the Metallurgical Department convened the TYZ-500 Technical Assessment of Patio Dental Drilling Rigs at Yaohe Cemetery, Hunan from November 25 to December 1, 1978. 82 delegates from 52 units attended the conference, including scientific research, design, universities and colleges, factories and mines. Ministry of Metallurgy, Hunan Metallurgical Bureau and Chenzhou Metallurgical Bureau of the relevant business unit leaders presided over and participated in the appraisal meeting. A machine-related companies and businesses sent to the guidance. Participants listened carefully to the Changsha Mining Research Institute, Yao Gang Xian tungsten mine, the next ridge tungsten mine, Shuikoushan lead-zinc mine on the patio cone drill and drill design, industrial testing and use of the introduction, visit