GB/T 15971-2023 Chinese PDF (GB/T15971-2023) GB/T 17529.5-2023 English versions: GB 15607-2023

English versions: GB 15607-2023

English versions: GB/T 12959-2024

GB/T 45538-2025_Chinese: Determination of plant extracts antioxidant activity - Thin layer chromatography method (Chinese: 植物提取物抗氧化活性测定 薄层色谱法)

4-2025_Chinese: Design specification for mechanical components in nuclear island of pressurized water reactor nuclear power plants - Part 4: Class 3 components (Chinese: 压水堆核电厂核岛机械设备设计规范 第4部分：3级设备)

inspection and testing

GB/T 15971-2023 Chinese PDF (GB/T15971-2023) GB/T 17529.5-2023 English versions: GB 15607-2023GB T 15971 2023_Chinese: Specification for tour guide service (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 15971 2023