GB/T 24021-2024 Chinese PDF (GB/T24021-2024) GB/T 29479.1-2025 4-2023_Chinese: Photobiological safety of lamps

4-2023_Chinese: Photobiological safety of lamps and lamp systems - Part 4: Measuring methods (Chinese: 灯和灯系统的光生物安全 第4部分：测量方法)

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)

English versions: GB/T 19598-2025

7-2024_Chinese: Methods for chemical analysis of nickel alloys - Part 7: Determination of cobalt

GB/T 20014

GB/T 24021-2024 Chinese PDF (GB/T24021-2024) GB/T 29479.1-2025 4-2023_Chinese: Photobiological safety of lampsGB T 24021 2024_Chinese: Environmental management Environmental labels and declarations Self declared environmental claims (Type II environmental labelling) (Chinese: II) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 24021 2024