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    • QUALIFICATION DOCUMENTS

    Adhering To The To Science And Technology As The Guide, Seek Levelopment By Innovation, Strives For The Survival By The Quality

    Business license System certification Qualification NORSOK M-650
  • ZY-ISO 45001-2018-PIPES
  • LS-ISO 45001-2018-FITTINGS
  • ZR-ISO 45001-2018-R&D
  • IQNET-ISO 45001
  • ZY-Q-SY 1002.1-2013
  • ZY-GB/T 19001-2016-PIPES
  • LS-GB/T 19001-2016-FITTINGS
  • ZR-GB/T 19001-2016-R&D
  • ZY-GB/T 24001-2016
  • LS-GB/T 24001-2016
  • ZR-GB/T 24001-2016
  • ZY-GB/T 45001-2020

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    E-mail：sales@longshengpiping.com

    ADD：YANGLONGTAN VILLAGE BIANWU TOWN YANSHAN COUNTY, HEBEI PROVINCE CHINA

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