
Devices to prevent pollution by backflow of potable water - Air gap with non-circular overflow (unrestricted) - Family A - Type B
出版:Asociacion Espanola de Normalizacion

專家解讀視頻
Devices to prevent pollution by backflow of potable water - Air gap with non-circular overflow (unrestricted) - Family A - Type B
出版:Asociacion Espanola de Normalizacion
專家解讀視頻