M00000379
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DIN CEN ISO/TS 11665-12 Measurement of radioactivity in the environment - Air: radon-222 - Part 12: Determination of the diffusion coefficient in waterproof materials: membrane one-side activity concentration measurement method (ISO/TS 11665-12:2018); German version CEN ISO/TS 11665-12:2021
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 06/01/2022
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Availability date: 2023-10-16