DANSK DS/EN ISO 11665-1:2019 环境中放射性的测量 空气:radon-222 第1部分:氡及其短寿命衰变产物的起源和相关测量方法(ISO 11665-1:2019)
Measurement of radioactivity in the environment – Air: radon-222 – Part 1: Origins of radon and its short-lived decay products and associated measurement methods (ISO 11665-1:2019)