GB/T 20776-2023 Chinese PDF (GB/T20776-2023) GB/T 15231-2023 English versions: GB/T 45299-2025

English versions: GB/T 45299-2025

GB/T 28547-2023_Chinese: Selection and application recommendations of metal oxide surge arresters for a

English versions: GB/T 45167-2024

power supply units and combinations thereof - Part 2: Particular requirements and tests for separating transformers and power supply units incorporating separating transformers for general applications (Chinese: 变压器、电抗器、电源装置及其组合的安全 第2部分：一般用途分离变压器和内装分离变压器的电源装置的特殊要求和试验)

GB/T 23454-2025_Chinese: Stone plate for vanity and countertop and windowsill (Chinese: 石材台面板)

GB/T 20776-2023 Chinese PDF (GB/T20776-2023) GB/T 15231-2023 English versions: GB/T 45299-2025GB T 20776 2023_Chinese: Classification for lifting appliances (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 20776 2023