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十一个大探矿公司发起,组成多频IP法研究小组,首先设计安装了一台装在卡车上的数字数据采集系统,可监测10~(-5)～10~5赫范围内的电流和
Eleven major prospecting companies initiated a multi-frequency IP research team to design and install a digital data acquisition system installed on a truck to monitor currents in the range of 10 -5 to 10 5 Hz