GB/T 19799.3-2025 Chinese PDF (GB /T19799.3-2025) GB/T 19405.3-2025 GB/T 20236-2025_Chinese: Accelerated outdoor weathering

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)

3-2025_Chinese: Types and dimensions of lamp caps - Part 3: Prefocus caps (Chinese: 灯头的型式和尺寸 第3部分：预聚焦式灯头)

Note/Careful: Text of PDF is in Chinese (not English)

1-2025_Chinese: Norm of water intake for industry in the Yellow River basin - Part 1: Thermal power production (Chinese: 黄河流域工业用水定额 第1部分：火力发电)

GB/T 19799.3-2025 Chinese PDF (GB /T19799.3-2025) GB/T 19405.3-2025 GB/T 20236-2025_Chinese: Accelerated outdoor weatheringGB 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