GB/T 20405.1-2023 Chinese PDF (GB/T20405.1-2023) GB/T 33136-2024 20-2025_Chinese: Methods for chemical analysis

20-2025_Chinese: Methods for chemical analysis of tungsten concentrates - Part 20: Determination of mercury content - Solid sampling and direct mercury analysis method (Chinese: 钨精矿化学分析方法 第20部分：汞含量的测定 固体进样直接测定法)

7-2024_Chinese: Low voltage fuses - Part 7: Supplementary requirements for fuse-links for the protection of batteries and battery systems (Chinese: 低压熔断器 第7部分：电池和电池系统保护用熔断体的补充要求)

English versions: GB/T 17821-2025

English versions: GB/T 33223-2024

English versions: GB/T 45533-2025

GB/T 20405.1-2023 Chinese PDF (GB/T20405.1-2023) GB/T 33136-2024 20-2025_Chinese: Methods for chemical analysisGB T 20405. 1 2023_Chinese: Urine absorbing aids for incontinence Polyacrylate superabsorbent powders Part 1: Test methods for determination of pH (Chinese: 1pH) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 20405. 1 2023