... hardness of geological features; They are used for core sample, soil, water well,borehole well, geothermal well, geotechnical enhineering, SPT..... ... mine, stone quarry, energy industry, geological exploitation.Advantages------ DLX series soil test drilling machine(100-600m):1) Designed for both water ... in the open field;7) With inner mud pump or standard mud pump from 100L/min to 250L/min;8) Supply ...