symmetrical four-pole sounding [地物] 对称四极测深

pole-pole sounding curve 单极单极电测深曲线

sounding pole [测] 测深杆 ; 测深杆竿

le-pole sounding curve 单极电测深曲线

symmetric four-pole sounding 对称四极测深

three pole sounding 三极测深

three-pole sounding 三极激电测深

borehole three pole sounding method 孔中三极法

five-pole electrical sounding 五极纵轴测深

five-pole longitudinal sounding 五极纵轴测深法