GB/T 20776-2023 Chinese PDF (GB/T20776-2023) GB/T 15231-2023 power supply units and combinations

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 1464-2024_Chinese: Test method for density of sandwich construction or cores (Chinese: 夹层结构或芯子密度试验方法)

English versions: GB/T 44966-2024

GB/T 15470

GB/T 20776-2023 Chinese PDF (GB/T20776-2023) GB/T 15231-2023 power supply units and combinationsGB 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