GB/T 18688-2023 Chinese PDF (GB/T18688-2023) GB/T 44965-2024 20-2025_Chinese: Methods for chemical analysis

20-2025_Chinese: Methods for chemical analysis of tungsten concentrates - Part 20: Determination of mercury content - Solid sampling and direct mercury analysis method (Chinese: 钨精矿化学分析方法 第20部分：汞含量的测定 固体进样直接测定法)

GB 10770-2025_Chinese: National food safety standard - Canned complementary foods for infants and young children (Chinese: 食品安全国家标准 婴幼儿罐装辅助食品)

GB/T 45533-2025_Chinese: Quality requirements for fermented meat products (Chinese: 发酵肉制品质量要求)

GB/T 45379-2025_Chinese: Five-axis hybrid electrical discharge and arc milling machines - Testing of the accuracy (Chinese: 五轴电火花电弧复合铣削机床 精度检验)

English versions: GB 16994

GB/T 18688-2023 Chinese PDF (GB/T18688-2023) GB/T 44965-2024 20-2025_Chinese: Methods for chemical analysisGB T 18688 2023_Chinese: Agricultural irrigation equipment Pressure losses in irrigation valves Test method (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 18688 2023