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GB/T 37580-2019 Requirements for buried polyethylene(PE)gas pipeline corrosion control engineering life cycle (USD) via email in 1-3 business day VALID
GB/T 37181-2018 Reinforced concrete corrosion control engineering life cycle—General requirements (USD) via email in 1-3 business day VALID
GB/T 22125-2008 Operation and management regulatioins for enterprises of marketing automobile parts via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
GB/T 31880-2015 Essential requirements of integrity for inspection body and laboratory (USD) via email in 1-3 business day VALID
GB/T 28836-2012 Credit evaluating index elements for international logistics enterprises (USD) via email in 1-3 business day VALID
GB/T 22116-2008 Expression of enterprises credit grade (USD) via email in 1-3 business day VALID
GB/T 37190-2018 Pipeline corrosion control engineering life cycle—General requirements (USD) via email in 1-3 business day VALID
DB43/T 1010-2015 via email in VALID please email coc@codeofchina.com for quotation
GB/T 30339-2013 Implementation guidelines on post project assessment (USD) via email in 1-3 business day VALID
GB/T 37590-2019 Corrosion control engineering life cycle—Guide for management work (USD) via email in 1-3 business day VALID
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