
Clay Masonry Units - Part 2: Thermal Insulation Units And Vertically Perforated Units Of Bulk Density Classes <=1,0
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
Clay Masonry Units - Part 2: Thermal Insulation Units And Vertically Perforated Units Of Bulk Density Classes <=1,0
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻