GB/T 31392-2022 Chinese PDF (GB/T31392-2022) GB/T 45132-2025 3-2024_Chinese: Welded austenitic-ferritic(duplex) stainless steel

3-2024_Chinese: Welded austenitic-ferritic(duplex) stainless steel tubes and pipes - Part 3: Pipes for oil and gas transmission (Chinese: 奥氏体-铁素体型双相不锈钢焊接钢管 第3部分：油气输送用管)

GB/T 26991-2023_Chinese: Test methods for power performance of fuel cell electric vehicles (Chinese: 燃料电池电动汽车动力性能试验方法)

4-2024_Chinese: Liquid crystal display devices - Part 4: Liquid crystal display modules and cells - Essential ratings and characteristics (Chinese: 液晶显示器件 第4部分：液晶显示模块和屏 基本额定值和特性)

GB/T 45309-2025_Chinese: Guidelines for classification and coding of enterprise procurement supplies (Chinese: 企业采购物资分类编码指南)

GB/T 29469-2024_Chinese: Cleanrooms and associated controlled environments - Evaluation of performance and rationality (Chinese: 洁净室及相关受控环境 性能及合理性评价)

GB/T 31392-2022 Chinese PDF (GB/T31392-2022) GB/T 45132-2025 3-2024_Chinese: Welded austenitic-ferritic(duplex) stainless steelGB T 31392 2022_Chinese: Technical guidance for the utilization of coal mine water (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 31392 2022