
Industrial Valves - Face-to-face And Centre-to-face Dimensions Of Metal Valves For Use In Flanges Pipe Systems - Part 1: Pn-designated Valves
出版:Polish Committee for Standardization

專家解讀視頻
Industrial Valves - Face-to-face And Centre-to-face Dimensions Of Metal Valves For Use In Flanges Pipe Systems - Part 1: Pn-designated Valves
出版:Polish Committee for Standardization
專家解讀視頻