GB/T 15231-2023 Chinese PDF (GB/T15231-2023) GB 5009.31-2025 GB 45672-2025_Chinese: On-board accident emergency

GB 45672-2025_Chinese: On-board accident emergency call system (Chinese: 车载事故紧急呼叫系统)

GB/T 27793-2024_Chinese: Beater addition non-asbestos sealing materials (Chinese: 抄取法无石棉纤维垫片材料)

40-2024_Chinese: Specifications for optical fibre test methods - Part 40: Measurement methods and test procedures for transmission characteristics - Attenuation (Chinese: 光纤试验方法规范 第40部分：传输特性的测量方法和试验程序 衰减)

GB/T 12940-2023_Chinese: Technical specification for silver-graphite electrical contacts (Chinese: 银石墨电触头技术条件)

GB/T 15231-2023 Chinese PDF (GB/T15231-2023) GB 5009.31-2025 GB 45672-2025_Chinese: On-board accident emergencyGB T 15231 2023_Chinese: Test methods for the properties of glassfibre reinforced cement (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 15231 2023