GB/T 42257-2022 Chinese PDF (GB/T42257-2022) GB/T 23538-2023 4-2024_Chinese: Surface cleaning appliances -

4-2024_Chinese: Surface cleaning appliances - Part 4: Cordless dry vacuum cleaners for household or similar use - Methods for measuring the performance (Chinese: 表面清洁器具 第4部分：家用和类似用途无线干式真空吸尘器 性能测试方法)

2-2024_Chinese: Liquid crystal display devices - Part 2: Liquid crystal display modules - Sectional specification (Chinese: 液晶显示器件 第2部分：液晶显示模块 分规范)

English versions: GB/T 23144-2023

GB/T 30425-2025_Chinese: Water cooling equipment for converter valves for high voltage direct current(HVDC) ower transmission (Chinese: 高压直流输电换流阀水冷却设备)

GB/T 45364-2025_Chinese: General technical requirements for domestic vacuum suction cups (Chinese: 日用真空吸盘类产品通用技术要求)

GB/T 42257-2022 Chinese PDF (GB/T42257-2022) GB/T 23538-2023 4-2024_Chinese: Surface cleaning appliances -GB T 42257 2022_Chinese: Method for measuring optical and laser performance for Chromium and Erbium co doped Yttrium Scandium Gallium Garnet laser crystal (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 42257 2022