@MagisterBracey @LazarusLong13 @TheSkylineTrail @San23Nia @Project95 @CleanAirCrewOrg They don't need to be replaced that often, unless you are in a very dirty environment. Good until they become hard to breathe through, usually months.
@MagisterBrasy@LazarusLong13@TheSkylineTrail@San23Nia@Project95@cleanAirfreworg它们不需要经常更换，除非你身处一个非常肮脏的环境中。好的，直到他们变得难以呼吸，通常是几个月。