GB/T 20424-2025 Chinese PDF (GB /T20424-2025) GB/T 16702.8-2025 1-2025_Chinese: Plastics - Impact-resistant polystyrene(PS-I)

1-2025_Chinese: Plastics - Impact-resistant polystyrene(PS-I) moulding and extrusion materials - Part 1: Designation system and basis for specifications (Chinese: 塑料 抗冲击聚苯乙烯（PS-I）模塑和挤出材料 第1部分：命名系统和分类基础)

English versions: GB/T 23454-2025

English versions: GB 6944-2025

English versions: GB/T 19183

GB/T 20424-2025 Chinese PDF (GB /T20424-2025) GB/T 16702.8-2025 1-2025_Chinese: Plastics - Impact-resistant polystyrene(PS-I)GB T 20424 2025_Chinese: The specification for limit on harmful element content of the heavy nonferrous metal concentrates products (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 20424 2025