
Shut-off valves for drinking water installations in properties and buildings - General requirements and tests for manually operated shut-off valves
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
Shut-off valves for drinking water installations in properties and buildings - General requirements and tests for manually operated shut-off valves
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻