
Timber Structures - Structural Prefabricated Wall, Floor And Roof Elements - Requirements
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
Timber Structures - Structural Prefabricated Wall, Floor And Roof Elements - Requirements
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻