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English versions: GB/T 41771
1-2025_Chinese: Specification of intellectual property appraisement - Part 1: General (Chinese: 知识产权鉴定规范 第1部分：总则)
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 30819-2024_Chinese: Harmonic drive gear reducers for robot (Chinese: 机器人用谐波齿轮减速器)
GB/T 20317-2023_Chinese: Fused extrusion and deposition modeling machines - Testing of the accuracy (Chinese: 熔融挤出沉积成形机床 精度检验)
GB/T 6519-2024 Chinese PDF (GB/T6519-2024) GB/T 25936.4-2024 English versions: GB/T 41771GB T 6519 2024_Chinese: Ultrasonic inspection of wrought aluminium and magnesium alloy products (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 6519 2024
