GB/T 5612-2025 Chinese PDF (GB /T5612-2025) GB/T 45628-2025 GB/T 45221-2025_Chinese: Chemicals - EASZY

GB/T 45221-2025_Chinese: Chemicals - EASZY assay - Detection of endorine active substances

English versions: GB/T 31036-2025

5-2025_Chinese: Uncut finished spectacle lenses - Part 5: Abrasion-resistant of surfaces test methods (Chinese: 眼镜镜片 第5部分：表面耐磨试验方法)

1-2025_Chinese: Plastics - Determination of temperature of deflection under load - Part 1: General test method (Chinese: 塑料 负荷变形温度的测定 第1部分：通用试验方法)

GB 30251-2024_Chinese: Norm of energy consumption per unit production of refining and chemical industry (Chinese: 炼化行业单位产品能源消耗限额)

GB/T 5612-2025 Chinese PDF (GB /T5612-2025) GB/T 45628-2025 GB/T 45221-2025_Chinese: Chemicals - EASZYGB T 5612 2025_Chinese: Designation of cast irons (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 5612 2025