高山峡谷地区桥址区岩溶发育特征地球物理勘察
陆泽峰

Geophysical exploration of karst development characteristics in bridge site of the alpine gorge area
LU Ze-Feng
图3 音频大地电磁法、对称四极测深法和地质剖面解释
Fig.3 Explanatory chart of audio-frequency magneto telluric method,symmetric four-pole sounding method and geological profile