GB 31604.61-2025 Chinese PDF GB 28263-2024 33-2024_Chinese: Specifications for optical fibre

33-2024_Chinese: Specifications for optical fibre test methods - Part 33: Measurement methods and test procedures for mechanical characteristics - Stress corrosion susceptibility (Chinese: 光纤试验方法规范 第33部分：机械性能的测量方法和试验程序 应力腐蚀敏感性参数)

GB/T 17436-2025_Chinese: Selection of explosion proof electrical equipment in ship hazardous areas (Chinese: 船舶危险区域防爆电气设备的选用)

3的直流充电系统)

GB/T 10361-2024_Chinese: Wheat

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 31604.61-2025 Chinese PDF GB 28263-2024 33-2024_Chinese: Specifications for optical fibreGB 31604. 61 2025_Chinese: National food safety standard Food contact materials and products Determination of migration of 2,2,4,4 tetramethyl 1,3 cyclobutanediol (Chinese: 2,2,4,4 1,3 ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB 31604. 61 2025