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GB/T 20931
GB/T 45471-2025_Chinese: Test method for mode III interlaminar fracture toughness of carbon fiber reinforced composite materials - Edge crack torsion method (Chinese: 碳纤维增强复合材料Ⅲ型层间断裂韧性的测定 边缘裂纹扭转法)
English versions: GB/T 44971-2024
English versions: GB/T 32873-2025
GB 15930-2024_Chinese: Fire dampers for building venting and smoke-venting system (Chinese: 建筑通风和排烟系统用防火阀门)
GB/T 20907-2024 Chinese PDF (GB/T20907-2024) GB/T 32151.32-2024 GB/T 20931GB T 20907 2024_Chinese: Technical specification for automatic fare collection system of urban rail transit (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 20907 2024
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