大庆深层油气勘探
deep-basin gas field beneath Daqing oil field
第二深度空间勘探与开采
Exploration and exploitation in second deep space of crust interior
第二深度空间找矿勘探
the second depth and space for ore exploration
电流透入深度
current penetration depth
Depth of Current Penetration
定深度勘探
a fixed depth of investigation
个人深入访谈
In-depth interview
Indepth interview
in-depth individual interview
Individual in-depth interview