活性炭吸附氡法在尼日尔Teguidda地区砂岩型铀矿勘查中的应用
활성탄흡부동법재니일이Teguidda지구사암형유광감사중적응용
The Application of Radon Survey by Activated Carbon in the Exploration of Sandstone-type Uranium Deposit in Teguidda, Niger