【本刊讯】为满足我国大型露天矿发展的需要,一种新型的大孔径牙轮钻机(如图)九月份在辽宁省沈阳市链条厂试制成功。这台钻机的设计充分贯彻了工人、领导干部和技术人员以及设计科研单位、制造厂和使用现场二个三结合,方案设计在使用现场完成。参加设计的单位有洛阳矿山机械研究所、东北工学院、沈阳市链条厂、鞍钢大孤山铁矿和鞍山矿山设计院、鞍钢矿山研究所、沈阳低压开关厂等单 In order to meet the needs of the development of large-scale surface mines in our country, a new type of large-diameter roller cone drilling rig (pictured) was successfully trialled in Shenyang, Liaoning Province in September. The design of this rig fully implements the combination of workers, leading cadres and technicians as well as design and research institutes, manufacturing plants and the use of the site. The design of the rig is completed on the site of use. Participate in the design unit Luoyang Mining Machinery Research Institute, Northeast Institute of Technology, Shenyang Chain Factory, Anshan Dagushan Iron Mine and Anshan Mining Design Institute, Anshan Iron and Mining Institute, Shenyang Low Voltage Switchgear and other single