GB/T 19799.3-2025 Chinese PDF (GB /T19799.3-2025) GB/T 19405.3-2025 GB/T 12690

GB/T 12690

GB/T 22371-2024_Chinese: Environmental protection requirements for facsimile machines and multi-function composite facsimile machines (Chinese: 传真机、多功能复合型传真机环境保护要求)

English versions: GB 31604

GB 20943-2025_Chinese: Minimum allowable values of energy efficiency and energy efficiency grades for AC-DC and AC-AC power supplies (Chinese: 交流-直流和交流-交流电源能效限定值及能效等级)

GB/T 20236-2025_Chinese: Accelerated outdoor weathering test methods for nonmetallic materials using concentrated natural sunlight (Chinese: 非金属材料的聚光加速户外暴露试验方法)

GB/T 19799.3-2025 Chinese PDF (GB /T19799.3-2025) GB/T 19405.3-2025 GB/T 12690GB T 19799. 3 2025_Chinese: Non destructive testing Ultrasonic testing block Part 3: Calibration block for curved surface (Chinese: 3) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 19799. 3 2025