GB/T 15231-2023 Chinese PDF (GB/T15231-2023) GB/T 44948-2024 English versions: GB/T 45219-2025

English versions: GB/T 45219-2025

English versions: GB/T 45351-2025

4-2024_Chinese: Information technology - Security techniques - Entity authentication - Part 4: Mechanisms using a cryptographic check function (Chinese: 信息技术 安全技术 实体鉴别 第4部分：采用密码校验函数的机制)

GB/T 26732-2025_Chinese: Process for retreading of tyres (Chinese: 轮胎翻新工艺)

GB 21257-2024_Chinese: Norm of energy consumption per unit production of caustic soda

GB/T 15231-2023 Chinese PDF (GB/T15231-2023) GB/T 44948-2024 English versions: GB/T 45219-2025GB T 15231 2023_Chinese: Test methods for the properties of glassfibre reinforced cement (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 15231 2023