DIN EN ISO 6149-4 (2014-07)被替代
Connections For Fluid Power And General Use - Ports And Stud Ends With Iso 261 Metric Threads And O-ring Sealing - Part 4: Dimensions, Design, Test Methods And Requirements For External Hex And Internal Hex Port Plugs (iso 6149-4:2006)
出版：German Institute for Standardisation (Deutsches Institut für Normung)
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