
Clay Masonry Units - Part 1: Solid Units And Vertically Perforated Units Of Bulk Density Classes >= 1.2
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
= 1.2,German Institute for Standardisation (Deutsches Institut für Normung)" />
Clay Masonry Units - Part 1: Solid Units And Vertically Perforated Units Of Bulk Density Classes >= 1.2
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻