
Drainage Systems On Private Ground - Design Of Sizes Of Drain, Waste And Ventilation Pipelines - Examples Of Calculation
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
Drainage Systems On Private Ground - Design Of Sizes Of Drain, Waste And Ventilation Pipelines - Examples Of Calculation
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻