GB/T 28029.13-2025 Chinese PDF (GB /T28029.13-2025) GB/T 14646-2025 GB/T 20931

GB/T 20931

30-2025_Chinese: National food safety standard - Food contact materials and products - Determination of phthalate esters and determination of migration (Chinese: 食品安全国家标准 食品接触材料及制品 邻苯二甲酸酯类化合物的测定和迁移量的测定)

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)

GB/T 20042

GB 17167-2025_Chinese: General rules for energy measuring instrument equipping and managing of energy user (Chinese: 用能单位能源计量器具配备和管理通则)

GB/T 28029.13-2025 Chinese PDF (GB /T28029.13-2025) GB/T 14646-2025 GB/T 20931GB T 28029. 13 2025_Chinese: Electronic railway equipment Train communication network (TCN) Part 4 1: The test method of train communication network based on Wire Train Bus(WTB) (Chinese: TCN) 4 1WTB) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 28029. 13 2025