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English versions: GB/T 14157-2023
GB 45248-2025_Chinese: Drug concentration cutoff values and examination for vehicle drivers (Chinese: 车辆驾驶人员体内毒品含量阈值与检验)
GB/T 18882
English versions: GB/T 29549
GB/T 33757
GB/T 7256.4-2023 Chinese PDF (GB/T7256.4-2023) GB 6944-2025 English versions: GB/T 14157-2023GB T 7256. 4 2023_Chinese: Lighting fixtures for civil airport Part 4: Wind direction indicator (Chinese: 4:) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 7256. 4 2023
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