... 1,for coal mining,ore exploration, 2,in construction drilling of railway,road,port,bridge 3,can be disambled if needy Drilling ... (single) max(KN)20Steel wire rope diameter (mm)11Mode of chuckFull-hydraulic chuck or ball-type chuckWeight(power unit excepted ... -200 core drilling rig: 1.Construction drilling of the projects e.g. prospection, railway, road, port, bridge, water conservancy and hydropower, ...