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2-2025_Chinese: Petroleum and natural gas industries - Materials for use in H2S-containing environments in oil and gas production - Part 2: Cracking-resistant carbon and low alloy steels
English versions: GB/T 22246-2025
English versions: GB 31604
English versions: GB/T 31033-2025
GB/T 29820
GB/T 3543.1-2025 Chinese PDF (GB /T3543.1-2025) GB/T 21121-2024 2-2025_Chinese: Petroleum and natural gasGB T 3543. 1 2025_Chinese: Rules for agricultural seed testing Part 1: General directives (Chinese: 1) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 3543. 1 2025
