Dekama hondai. KN95 kiyanne Chinese standard eka. US wala karapu test ekakadi KN ewa gananawaka pramithi prashna thibila tiyenawa.
Correct. Nearly 70% of the Chinese produced KN95 masks failed to meet the requirements. Some countries in Europe found the same and returned these back to China.
There are several face mask standards in use across the world. They have minor differences.
N95 (United States) , FFP2 (Europe), KN95 (China), P2 (Australia/New Zealand), KF94 (Korea) & DS2 (Japan)