DIN EN ISO 16890-4:2017-08 一般通风用空气过滤器 - 第 4 部分:确定最小分数测试效率的调节方法 (ISO 16890-4:2016)
Air filters for general ventilation - Part 4: Conditioning method to determine the minimum fractional test efficiency (ISO 16890-4:2016); German version EN ISO 16890-4:2016 / Note: To be replaced by DIN EN ISO 16890-4 (2020-04).