GB/T 20236-2025 Chinese PDF (GB /T20236-2025) GB/T 20882.1-2025 GB/T 18978

GB/T 18978

GB/T 18376

GB/T 18649-2024_Chinese: Diagnostic techniques for contagious bovine pleuropneumonia (Chinese: 牛传染性胸膜肺炎诊断技术)

4-2024_Chinese: Chemical analysis methods of mixed rare earth oxide of ion-absorption rare earth ore - Part 4: Determination of iron trioxide content - Inductively coupled plasma atomic emission spectrometry (Chinese: 离子型稀土矿混合稀土氧化物化学分析方法 第4部分：三氧化二铁含量的测定 电感耦合等离子体发射光谱法)

GB/T 20236-2025 Chinese PDF (GB /T20236-2025) GB/T 20882.1-2025 GB/T 18978GB T 20236 2025_Chinese: Accelerated outdoor weathering test methods for nonmetallic materials using concentrated natural sunlight (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 20236 2025