
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

专家解读视频
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
专家解读视频