DIN EN ISO 16890-2:2023-12 一般通风用空气过滤器 第 2 部分:分级效率和气流阻力的测量(ISO 16890-2:2022);德文版 EN ISO 16890-2:2022
Air filters for general ventilation - Part 2: Measurement of fractional efficiency and air flow resistance (ISO 16890-2:2022); German version EN ISO 16890-2:2022