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www.ChineseStandard.net Database: 189760 (18 Oct 2025)

YB 421-1977

Chinese Standard: 'YB 421-1977'
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)See DetailStatusRelated Standard
YB 421-1977EnglishRFQ ASK Days<=3 (Chinese Industry Standard) YB 421-1977 Obsolete YB 421-1977

  SIMILAR unprotected-true-PDFs:
  YB/T 6139.2-2023  YB/T 6139.1-2023  GB/T 18487.2-2017