What is the efficiency of a nylon mesh coarse air filter?
only for 5UM, 1UM, 0.5UM.0.3um, 0.12um rules
, but the standard does not provide much more than the level of particles,
the aperture is greater than 10UM, can only be used to filter more than 10UM particles,
There is no standard, the aperture of the nylon net is relatively large,
