ＺＲＤ２０型软岩锚杆钻机用于钻抗压强度低、遇水膨胀和泥化的软岩巷道锚杆孔，是由煤科总院南京煤研所和中国矿大机械厂共同研制的新型电液型钻机。由于本产品在煤矿井下作业时，要经常变动工作地点，而且煤矿井下作业空间狭窄，要求钻机体积小、重量轻、便于搬动。所以... ZRD20 soft rock bolt drilling rig for drilling low compressive strength, water swelling and muddy soft rock roadway bolt hole, is jointly developed by the Coal Institute Nanjing Coal Research Institute and China Mining Machinery Factory jointly developed a new type of electricity Liquid drilling machine. As this product in the coal mine operations, we must change the workplace frequently, and the coal mine work space is narrow, requiring small rig, light weight, easy to move. and so...