Beijing EarthLong is an high-tech manufacture of the geological equipments for ore exploration, Mainly Electrical instruments: DWJ-3B IP& Resistivity Receiver, DJF-6A(5kw) IP& Resistivity system, DJF-10A(10kw) IP& Resistivity system, DD-25(25kw) high power IP& Resistivity system. Magnetometer :MCL-2 Fluxgate Magnetometer, MCL-5 Microprocessor Fluxgate Magnetometer, MCL-6 Tri-component Fluxgate Magnetometer, PM-2 Proton Magnetometer. Borehole seismograph logging system: XG-II Full-wave borehole logging system, XG-I logging system, TB-logging system, SM98-24B Rayleigh Seismograph竊�ransient, Steady竊� for domestic exclusive high-tech research ,get rid of the heavy ground source, realized the automation of wave logging.With our sincerity, diligence and wisdom to make company our development.