Multifunctional Digital DC Instrument For Gold Mine Exploration WDJD-4A Multiple Function DC Resistivity/IP Meter The WDJD-4A Multi-Function Digital DC Resistivity/IP Meter builds upon the WDJD-3A ...더 견해
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WDJD-4A Geophysical Resistivity Meter with 0-500m Prospecting Depth and Multi-electrode 2D Resistivity Imaging for High Accuracy Surveys