
Lightweight Concrete Hollow Blocks - Part 100: Hollow Blocks With Specific Properties
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
Lightweight Concrete Hollow Blocks - Part 100: Hollow Blocks With Specific Properties
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻