Hebei iron mine, cross-section 5×5 m, rock hardness F10-12. Drilling Rig equipped with Woserld hydraulic rock drill, hole depth 3.7 m, average drilling time per hole: 1 minute 30 seconds.
Hebei iron mine, cross-section 5×5 m, rock hardness F10-12. Drilling Rig equipped with Woserld hydraulic rock drill, hole depth 3.7 m, average drilling time per hole: 1 minute 30 seconds.