
Metal Valves For Use In Flanged Pipe Systems - Face To Face And Centre To Face Dimensions. Part 1: General (pren 558-1)
出版:British Standards Institution

專家解讀視頻
Metal Valves For Use In Flanged Pipe Systems - Face To Face And Centre To Face Dimensions. Part 1: General (pren 558-1)
出版:British Standards Institution
專家解讀視頻