GB/T 22890.1-2024 Chinese PDF (GB/T22890.1-2024) GB/T 26731-2024 GB/T 7143-2025_Chinese: Methods for chemical

GB/T 7143-2025_Chinese: Methods for chemical analysis of silica sand for foundry (Chinese: 铸造用硅砂化学分析方法)

control and automation - Part 1: System interface between industrial facilities and the smart grid (Chinese: 工业过程测量、控制和自动化 第 1 部分：工业设施和智能电网之间的系统接口)

GB/T 45458-2025_Chinese: Method for determination of trace elements in attapulgite (Chinese: 凹凸棒石微量元素测定方法)

English versions: GB/T 10067

GB/T 22890.1-2024 Chinese PDF (GB/T22890.1-2024) GB/T 26731-2024 GB/T 7143-2025_Chinese: Methods for chemicalGB T 22890. 1 2024_Chinese: Leather Determination of water resistance of flexible leather Part 1: Repeated linear compression(penetrometer) (Chinese: 1) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 22890. 1 2024