GB/T 4272-2024 Chinese PDF (GB/T4272-2024) GB/T 19266-2024 GB/T 22453-2025_Chinese: Non-linear optical crystal

GB/T 22453-2025_Chinese: Non-linear optical crystal devices measuring method for laser (Chinese: 激光用非线性光学晶体元件性能测量方法)

7-2024_Chinese: Methods for chemical analysis of silver - Part 7: Determination of gold and palladium content - Inductively coupled plasma emission spectrometry (Chinese: 银化学分析方法 第7部分：金、钯量的测定 电感耦合等离子体发射光谱法)

4-2023_Chinese: Buried polyethylene(PE) piping systems for the supply of gaseous fuels - Part 4: Valves (Chinese: 燃气用埋地聚乙烯（PE）管道系统 第4部分：阀门)

GB/T 21397-2023_Chinese: Cotton harvesters (Chinese: 棉花收获机)

GB/T 13888-2024_Chinese: Methods of measurement of the coercivity(up to 160 kA/m) of magnetic materials in an open magnetic circuit (Chinese: 在开磁路中测量磁性材料矫顽力（至160kA/m）的方法)

GB/T 4272-2024 Chinese PDF (GB/T4272-2024) GB/T 19266-2024 GB/T 22453-2025_Chinese: Non-linear optical crystalGB T 4272 2024_Chinese: General principles of thermal insulation technique for equipment and pipes (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 4272 2024