135922 ⎘
Methods of hydraulic mining; Hydraulic monitors; Means for generating pulsating fluid jets by use of highly pressurised liquid
METHOD FOR CONSTRUCTING ARTIFICIAL WATER-CONDUCTING CHANNEL THROUGH PULSE HYDRAULIC FRACTURING OF DRAINAGE BOREHOLES IN ROOF AQUIFER
#2Borehole Mining System and Methods Using Sonic-Pulsed Jetting Excavation and Eductor Slurry Recovery Apparatus
#3Hyper-pressure pulse excavator