Tinea-Capitis
发表于 2025-3-28 15:36:50
http://reply.papertrans.cn/31/3004/300347/300347_41.png
myocardium
发表于 2025-3-28 20:43:30
,Electromagnetic Sounding Methods—Introduction and History,rents are used. In the first case, the theory is developed entirely on the basis of the conservation of current, which leads ultimately to the solution of Laplace’s equation in computing the resistivity of the earth from field data. In the AC methods for measuring earth conductivity, a time-varying