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江汉机械研究所研制的HKZ—150A型横孔螺旋钻机的首台样机,经过在上海金山和北京通县地区5个孔的管道穿越试验,取得成功。钻机穿越孔径为426mm,穿越长度分别为44m、51m和56m。
The first prototype of HKZ-150A horizontal hole auger developed by Jianghan Institute of Machinery succeeded in the pipeline crossing test of 5 holes in Shanghai Jinshan and Beijing Tongxian areas. Drill through the aperture of 426mm, through the length of 44m, 51m and 56m.