地—井瞬变电磁关键技术问题研究

杜庆丰, 冯晓兰, 黄跃

Research on key technical problems of surface-borehole TEM

Qing-Feng DU, Xiao-Lan FENG, Yue HUANG

图4 定向器各角度示意

Fig.4 Schematic diagrams of the orientation angles