GB/T 24630.1-2024 Chinese PDF (GB/T24630.1-2024) GB/T 29912-2024 6-2025_Chinese: Methods for chemical analysis

6-2025_Chinese: Methods for chemical analysis of lead concentrates - Part 6: Determination of bismuth content (Chinese: 铅精矿化学分析方法 第6部分：铋含量的测定)

GB/T 45253-2025_Chinese: Internet psychological services - General specification for evaluation services of psychology (Chinese: 互联网心理服务 心理测评服务通用规范)

GB/T 1243-2024_Chinese: Short-pitch transmission precision roller and bush chains

5-2023_Chinese: Plastics - Determination of resistance to environmental stress cracking (ESC) - Part 5: Constant tensile deformation method (Chinese: 塑料 耐环境应力开裂(ESC)的测定 第5部分:恒定拉伸变形法)

GB/T 24630.1-2024 Chinese PDF (GB/T24630.1-2024) GB/T 29912-2024 6-2025_Chinese: Methods for chemical analysisGB T 24630. 1 2024_Chinese: Geometrical product specifications(GPS) Flatness Part 1: Vocabulary and parameters of flatness (Chinese: GPS 1) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 24630. 1 2024