@connellryan1 @DrLeanaWen 3mm is easily visible. It's enough for two coins to pass through the gap. That's just not the case with any "reasonable" fit.
Mask mandate policies exist even if you disagree.
Common N95, KF94, and KN95 masks aren't medical devices, only medically registered ones are.
@DrLeanaWen 3mm处的connellryan1易于看到。两枚硬币通过缺口就足够了。任何“合理”的配合都不是这样。
即使您不同意，也存在掩盖授权政策。
普通N95、KF94和KN95口罩不是医疗器械，只有医学注册的才是。