GB/T 45049-2024 Chinese PDF (GB /T45049-2024) GB/T 30889-2024 2-2025_Chinese: Plastics - Impact-resistant polystyrene

2-2025_Chinese: Plastics - Impact-resistant polystyrene (PS-I)moulding and extrusion materials - Part 2: Preparation of test specimens and determination of properties (Chinese: 塑料 抗冲击聚苯乙烯（PS-I）模塑和挤出材料 第2部分：试样制备和性能测定)

GB/T 44855-2024_Chinese: Management specification for water conservation of cooling towers (Chinese: 冷却塔节水管理规范)

3-2025_Chinese: Uncut finished spectacle lenses - Part 3: Transmittance test methods (Chinese: 眼镜镜片 第3部分：透射比试验方法)

English versions: GB/T 44937

English versions: GB/T 2878

GB/T 45049-2024 Chinese PDF (GB /T45049-2024) GB/T 30889-2024 2-2025_Chinese: Plastics - Impact-resistant polystyreneGB T 45049 2024_Chinese: Earth moving machinery Battery electric hydraulic excavators Test methods (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 45049 2024