HEPA filter resistance was related with filtration media, pleat distance, pleat depth, pleat shape and air flow temperature.

高效空气过滤器的阻力与滤纸特性、滤纸褶间距、滤纸褶深、滤纸褶形状、气流温度等有关。

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All together 13 LABS participated an unofficially organized and non-commercial oriented round-robin test for HEPA filter media, to demonstrate possible variations of testing data.

共13家实验室参与了民间发起的、非商业目的的空气滤纸对比试验，旨在检验国内高效滤纸数据的偏离程度。

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