
Cement mortar linings for ductile iron and steel pipes and fittings; application, requirements and testing
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
Cement mortar linings for ductile iron and steel pipes and fittings; application, requirements and testing
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻