GB/T 21551.1-2024 Chinese PDF (GB /T21551.1-2024) GB/T 21200-2024 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)

2-2024_Chinese: Lighting of work places - Part 2: Lighting requirements for safety and security of outdoor work places (Chinese: 工作场所照明 第2部分：室外作业场所的安全保障照明要求)

English versions: GB/T 20236-2025

1) - Part 1: Specification of basic notation (Chinese: 信息技术 抽象语法记法一（ASN

GB/T 21551.1-2024 Chinese PDF (GB /T21551.1-2024) GB/T 21200-2024 2-2025_Chinese: Plastics - Impact-resistant polystyreneGB T 21551. 1 2024_Chinese: Antimicrobial and cleaning function of household and similar electrical appliances Part 1: General requirement (Chinese: 1) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 21551. 1 2024