@CleanAirStars @eswillwalker @JimRosenthal4 Particle load per unit of air times volume of air through the filter integrated over time.
@CleanAirStars @eswillwalker @JimRosenthal4 每单位空气的颗粒负载乘以通过过滤器的空气量随时间积分。
@CleanAirStars @eswillwalker @JimRosenthal4 Particle load per unit of air times volume of air through the filter integrated over time.
@CleanAirStars @eswillwalker @JimRosenthal4 每单位空气的颗粒负载乘以通过过滤器的空气量随时间积分。