ＧＸＹ—４型多用途钻机的研制李正泉（西安探矿机械厂西安７１００６１）为了满足全国各部门地勘队伍开拓地质市场，承揽基础桩工程施工任务的需要，缓解答施工单位资金拮据和设备不足的困难，西安探矿机械厂受地质矿产部直管局的委托，承担了改造原ＸＹ—４型岩心钻机的... Development of GXY-4 multi-purpose drilling rig LI Zheng-Quan (Xi’an Prospecting Machinery Factory, Xi’an 710061) In order to meet the need of geological prospecting teams in various departments of the country to open up the geological market and to undertake the task of construction of foundation piles, it is necessary to ease the difficulties of capital construction and equipment shortage , Xi’an prospecting machinery factory commissioned by the Directorate of Geology and Mineral Resources Bureau, undertook the transformation of the original XY-4-type core drilling rig ...