超声波钻孔电视
acoustic borehole televiewer
钻孔电视摄影机
television borehole camera
钻孔彩色电视录像
Color TV Video record inborehole
大孔钻孔
big-diameter hole drilling
精密深孔钻孔工具
precision deep hole drilling tool
钻孔－电测法
hole-drilling and electrical-measurement method
钻孔电磁波CT
drilling electromagnetic wave CT