About NAGANO KATSUHIRO
About 東京理大 理工
About KOJIMA HIROSHI
About 東京理大 理工
About Radon
About radon 222
About model
About dissipation
About underground
About ratio
About Computer Simulation
About transport model
About dissipation ratio
About computer application
About utilization
About 地中ラドン
About ラドン散逸
About Measuring methods and instruments of natural radioactivity
About 地中
About ラドン
About 輸送モデル
About 気象要素
About 散逸