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单词 electromagnetic surveying
释义 electromagnetic surveying
[i¦lek·trō·mag`ned·ik sǝr`vā·iŋ]
ENGINEERING
Underground surveying carried out by generating electromagnetic waves at the surface of the earth; the waves penetrate the earth and induce currents in conducting ore bodies, thereby generating new waves that are detected by instruments at the surface or by a receiving coil lowered into a borehole. Also known as electromagnetic prospecting.
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