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GB/T 15231-2023 Chinese PDF (GB/T15231-2023) GB/T 44948-2024 English versions: GB/T 45351-2025

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English versions: GB/T 45351-2025

3-2025_Chinese: China standard time - Part 3: Bulletin (Chinese: 中国标准时间 第3部分：公报)

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)

English versions: GB/T 45139-2024

GB/T 20042

GB/T 15231-2023 Chinese PDF (GB/T15231-2023) GB/T 44948-2024 English versions: GB/T 45351-2025GB 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

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