
Devices for the prevention of pollution from backwater of drinking water - Backflow preventer with non-circular overflow (not limited) - Family A - Type B
出版:Ente Nazionale Italiano di Unificazione (UNI)

專家解讀視頻
Devices for the prevention of pollution from backwater of drinking water - Backflow preventer with non-circular overflow (not limited) - Family A - Type B
出版:Ente Nazionale Italiano di Unificazione (UNI)
專家解讀視頻