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1-2023_Chinese: Buried polyethylene(PE) piping systems for the supply of gaseous fuels - Part 1: General (Chinese: 燃气用埋地聚乙烯（PE）管道系统 第1部分：总则)
English versions: GB/T 17670-2025
English versions: GB/T 45198-2024
English versions: GB 43631-2023
English versions: GB 45067-2024
GB/T 19256.5-2022 Chinese PDF (GB/T19256.5-2022) GB/T 44979-2024 1-2023_Chinese: Buried polyethylene(PE) piping systemsGB T 19256. 5 2022_Chinese: Electronic business extensible markup language (ebXML) Part 5: Core components specification (Chinese: XML 5) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 19256. 5 2022
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