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English versions: GB/T 24931-2025
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
5-2024_Chinese: Electric vehicle conductive charging system - Part 5: DC charging system for GB/T 20234
GB/T 24212-2025_Chinese: Methylnaphthalene oil (Chinese: 甲基萘油)
GB/T 45131-2025 Chinese PDF (GB /T45131-2025) GB/T 45030-2024 English versions: GB/T 24931-2025GB T 45131 2025_Chinese: Analysis of water used in boiler and cooling system Determination of phosphate, chloride, silicate, total alkalinity, phenolphthalein alkalinity, hardness and iron Spectrophotometric detection by discrete analysis systems (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 45131 2025
