Devices to prevent pollution by backflow of potable water - Air gap with non-circular overflow (unrestricted) - Family A, type B; German version EN 13077:2003— 16 стр.
Protection against pollution of potable water installations and general requirements of devices to prevent pollution by backflow - Technical rule of the DVGW; German version EN 1717:2000— 48 стр.
Devices to prevent pollution by backflow of potable water - Air gap with non-circular overflow (unrestricted) - Family A, Type B; German version EN 13077:2008— 17 стр.
Devices to prevent pollution by backflow of potable water - Air gap with non-circular overflow (unrestricted) - Family A, Type B; German version EN 13077:2008— 17 стр.
