
Stud Ends And Ports Of Fittings, Valves And Plug Screws - Part 21: Dimensions For Pipe Thread According To Din En Iso 228-1 And O-ring Sealing
出版:German Institute for Standardisation (Deutsches Institut für Normung)

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Stud Ends And Ports Of Fittings, Valves And Plug Screws - Part 21: Dimensions For Pipe Thread According To Din En Iso 228-1 And O-ring Sealing
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频