Air filters for general ventilation. Technical specifications, requirements and classification system based upon particulate matter efficiency (ePM)— 36 стр.
Air filters for general ventilation -- Part 3: Determination of the gravimetric efficiency and the air flow resistance versus the mass of test dust captured— 28 стр.
Ambient air. Standard gravimetric measurement method for the determination of the PM$d1$d0 or PM$d2$d,$d5 mass concentration of suspended particulate matter— 58 стр.