A first reconnaissance can be made by light aeroplane . 可用一架轻型飞机进行初次勘选。
A single line of easily accessible stations can be selected . 只须勘选由易于到达的一些测站所构成的一条单线。
Because this fact was no recognized, the early magnetic prospecting for iron deposits was spectacularly unsuccessful . 由于不了解这个事实,因此早期为寻找铁矿进行磁法勘深,遭到了惊人的失败。
Application of soft starter in geological exploration 软起动器在地勘业中的应用
Taxation management of geological exploration enterprises 浅谈地勘企业的税收筹划