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根据中华人民共和国地质矿产部与原苏联地质部签订的关于开展地学领域科技交流与合作协议,应全苏勘探技术研究所的邀请,由李常茂、闫立本、雷恒仁、徐兴、杜凯林等同志组成地矿部水力输送岩心考察团.于1991年10月3日至17日对全苏勘探技术研究所进行了访问.在此之前,1989年曾对运用水力输送岩心钻探法钻软岩进行过考察.本次考察侧重以同样方法钻硬岩的有关技术和苏联系列钻探设备的某些技术问题.
According to the agreement signed by the Department of Geology and Mineral Resources of the People’s Republic of China and the former Soviet Union Ministry of Geology on conducting scientific and technological exchanges and cooperation in geosciences, Li Jingmao, Yan Libin, Lei Hengren, Xu Xing, Du Kaolin and other comrades should be invited by Quanzhong Exploration Technology Institute A delegation from the Ministry of Mines and Hydraulic Conveying Center visited the All-China Exploration Institute of Technology, from October 3 to 17, 1991. Previously, the exploration of soft rock using hydraulic-boring core drilling had been conducted prior to 1989. This study focused on the related techniques of drilling hard rock in the same way and some technical problems of the Soviet series of drilling equipment.