UNE-EN ISO 11665-6:2020
環境中放射性的測量 空氣:radon-222 第6部分:活性濃度的點測量方法
Measurement of radioactivity in the environment - Air: radon-222 - Part 6: Spot measurement methods of the activity concentration (ISO 11665-6:2020) (Endorsed by Asociación Espa?ola de Normalización in March of 2020.)