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Song DZ, He XQ, Wei MH, 2023. Direction-finding and positioning system of electromagnetic emission of coal or rock fracture. No. US17679137

He XQ, Song DZ, 2018. Electric-seismic coupling monitoring and early warning method for typical dynamic disasters in mines. No. 2016108067189

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Song DZ, He XQ, Wei MH, 2021. An EMR direction finding and positioning system for coal and rock damage. No. 202111029429X