GB/T 4541-2023 Chinese PDF (GB/T4541-2023) GB/T 44115.3-2025 GB/T 21431-2023_Chinese: Technical specification for

GB/T 21431-2023_Chinese: Technical specification for inspection of lightning protection systems of buildings (Chinese: 建筑物雷电防护装置检测技术规范)

English versions: GB 4234

English versions: GB/T 42203-2022

GB 44015-2024_Chinese: Minimum allowable of energy efficiency and energy efficiency grades for cold store(box) and refrigerant compressor condensing unit (Chinese: 冷库（箱）和压缩冷凝机组能效限定值及能效等级)

GB/T 4541-2023 Chinese PDF (GB/T4541-2023) GB/T 44115.3-2025 GB/T 21431-2023_Chinese: Technical specification forGB T 4541 2023_Chinese: Position indicating lights for life saving appliances of marine (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 4541 2023