GB/T 15231-2023 Chinese PDF (GB/T15231-2023) GB 5009.31-2025 English versions: GB/T 45238-2025

English versions: GB/T 45238-2025

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 13929-2024_Chinese: Water ring vacuum pumps and compressors - Testing method (Chinese: 水环真空泵和水环压缩机 试验方法)

GB/T 44962-2024_Chinese: Grain and oil machinery - Wheat debranner (Chinese: 粮油机械 小麦剥皮机)

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

GB/T 15231-2023 Chinese PDF (GB/T15231-2023) GB 5009.31-2025 English versions: GB/T 45238-2025GB 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