GB/T 15558.2-2023 Chinese PDF (GB/T15558.2-2023) GB/T 45253-2025 English versions: GB/T 17903

English versions: GB/T 17903

GB/T 14078-2024_Chinese: Technical specification for He-Ne lasers (Chinese: 氦氖激光器技术规范)

English versions: GB/T 45220-2025

GB 15607-2023_Chinese: Safety code of practice for coating - Safety for electrostatic powder coating process (Chinese: 涂装作业安全规程 粉末静电喷涂工艺安全)

1-2024_Chinese: Plastics - Poly(methyl methacrylate)(PMMA) moulding and extrusion materials - Part 1: Designation system and basis for specifications (Chinese: 塑料 聚甲基丙烯酸甲酯(PMMA)模塑和挤出材料 第1部分：命名系统和分类基础)

GB/T 15558.2-2023 Chinese PDF (GB/T15558.2-2023) GB/T 45253-2025 English versions: GB/T 17903GB T 15558. 2 2023_Chinese: Buried polyethylene(PE) piping systems for the supply of gaseous fuels Part 2: Pipes (Chinese: PE 2) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 15558. 2 2023