GB/T 4340.3-2025 Chinese PDF (GB /T4340.3-2025) GB/T 22251-2024 1-2025_Chinese: Cards and security devices

1-2025_Chinese: Cards and security devices for personal identification - Test methods - Part 1: General characteristics (Chinese: 卡及身份识别安全设备 测试方法 第1部分：一般特性)

English versions: GB/T 2773-2025

English versions: GB 45186-2024

4-2024_Chinese: Mineral and sapphire watch-glasses - Part 4: Anti-reflective treatment (Chinese: 无机和蓝宝石手表玻璃 第4部分：减反射处理)

GB/T 34110-2025_Chinese: Information and documentation - Records management - Core concepts and vocabulary (Chinese: 信息与文献 文件（档案）管理 核心概念与术语)

GB/T 4340.3-2025 Chinese PDF (GB /T4340.3-2025) GB/T 22251-2024 1-2025_Chinese: Cards and security devicesGB T 4340. 3 2025_Chinese: Metallic materials Vickers hardness test Part 3: Calibration of reference blocks (Chinese: 3) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 4340. 3 2025