
En 1092-1 Draft Standard For Flanges And Their Joints - Circular Flanges For Pipes , Valves And Fittings - Part 1: Steel Flanges - Pn Designated
出版:British Standards Institution

專家解讀視頻
En 1092-1 Draft Standard For Flanges And Their Joints - Circular Flanges For Pipes , Valves And Fittings - Part 1: Steel Flanges - Pn Designated
出版:British Standards Institution
專家解讀視頻