
Concrete - Specification, performance, production and conformity - Part 2: Conformity assessment and certification; German and English version prEN 206-2:2024
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
Concrete - Specification, performance, production and conformity - Part 2: Conformity assessment and certification; German and English version prEN 206-2:2024
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻