GB/T 21638-2025 Chinese PDF (GB /T21638-2025) GB/T 15180-2025 171-2024_Chinese: Ergonomics of human-system interaction

171-2024_Chinese: Ergonomics of human-system interaction - Part 171: Guidance on software accessible design (Chinese: 人-系统交互工效学 第171部分：软件无障碍设计指南)

3-cyclobutanediol (Chinese: 食品安全国家标准 食品接触材料及制品 2

24-2025_Chinese: Methods for chemical analysis of magnesium and magnesium alloys - Part 24: Determination of trace impurity elements contents - Glow discharge mass spectrometry (Chinese: 镁及镁合金化学分析方法 第24部分：痕量杂质元素的测定 辉光放电质谱法)

English versions: GB 45248-2025

English versions: GB/T 25025-2025

GB/T 21638-2025 Chinese PDF (GB /T21638-2025) GB/T 15180-2025 171-2024_Chinese: Ergonomics of human-system interactionGB T 21638 2025_Chinese: Microbeam analysis Guidelines for electron beam microanalysis of defects in steel materials (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 21638 2025