GB 28881-2023 Chinese PDF GB 30510-2024 English versions: GBZ45268-2025

English versions: GBZ45268-2025

English versions: GB/T 45109

GB/T 45286-2025_Chinese: Information technology - Technical specification of the augmented reality system for handheld mobile devices (Chinese: 信息技术 手持式移动设备增强现实系统技术规范)

GB/T 20424-2025_Chinese: The specification for limit on harmful element content of the heavy nonferrous metal concentrates products (Chinese: 重有色金属精矿产品中有害元素的限量规范)

21-2025_Chinese: Test method for noise of household and similar electrical appliances - Part 21: Particular requirements for oral hygiene appliances (Chinese: 家用和类似用途电器噪声测试方法 第21部分：口腔卫生器具的特殊要求)

GB 28881-2023 Chinese PDF GB 30510-2024 English versions: GBZ45268-2025GB 28881 2023_Chinese: Hand protection Protective gloves against chemicals and micro organisms (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB 28881 2023