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YD 344-1990

Chinese Standard: 'YD 344-1990'
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)See DetailStatusRelated Standard
YD 344-1990English1219 Add to Cart Days<=6 [YD/T 344-1990] Requirements for PABXs access to public telephone switching network YD 344-1990   YD 344-1990

  SIMILAR Google-Books for your assessment (Full-PDF of YD 344-1990_English needs to be translated from scratch):
  YD/T 1118.3-2018  YD/T 2341.1-2011