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G-4型工程钻机设计方案审定会已于1987年7月14、15日在江苏省无锡市召开。该钻机是建设部综合勘察研究院和地矿部中国地质机械仪器公司、江苏省无锡探矿机械厂共同开发研制的。参加审定会的有城乡建设、地质矿产、冶金、航空、化工等系统及地方勘察单位的23名代表。与会者对设计方案给予充分肯定:该机具有正反循环、钻斗、短螺旋,是一种回转式灌柱桩施工钻机,也可钻斜孔,参数、布局较合理;适应范围广,地下水位以上、以下均可施工:吸收并发展了无锡
The G-4 engineering drilling rig design approval meeting was held on July 14th and 15th, 1987 in Wuxi, Jiangsu Province. The drilling rig was jointly developed by the Ministry of Construction’s General Survey Institute, the China Geological Machinery Instrument Company of the Ministry of Geology and Mineral Resources, and the Wuxi Exploration Machinery Factory of Jiangsu Province. Twenty-three representatives of systems and local surveying units for urban and rural construction, geological and mineral resources, metallurgy, aerospace, and chemical engineering, etc. participated in the validation meeting. Participants fully affirmed the design proposal: The machine has positive and negative circulation, drill bucket, short spiral, is a rotary drilling pile construction drilling rig, can also drill inclined hole, parameters, layout is reasonable; adapt to a wide range of groundwater Above and below can be constructed: Absorb and develop Wuxi