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GB/T 11199-2024_Chinese: High-purity sodium hydroxide (Chinese: 高纯氢氧化钠)
GB/T 19277
GB/T 11345-2023_Chinese: Non-destructive testing of welds - Ultrasonic testing - Techniques
English versions: GB/T 20243
GB/T 21638-2025_Chinese: Microbeam analysis - Guidelines for electron beam microanalysis of defects in steel materials (Chinese: 微束分析 钢铁材料缺陷电子束显微分析方法通则)
GB/T 19042.6-2023 Chinese PDF (GB/T19042.6-2023) GB/T 18487.4-2025 GB/T 11199-2024_Chinese: High-purity sodium hydroxideGB T 19042. 6 2023_Chinese: Evaluation and routine testing in medical imaging departments Part 3 6: mammographic X ray equipment used in a mammographic tomosynthesis mode of operation imaging performance acceptance and constancy tests (Chinese: 3 6:X) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 19042. 6 2023
