GB/T 45263-2025 Chinese PDF (GB /T45263-2025) GB/T 18649-2024 2-2024_Chinese: Acoustics - Calibration of

2-2024_Chinese: Acoustics - Calibration of hydrophones - Part 2: Procedures for low frequency pressure calibration (Chinese: 声学 水听器校准 第2部分：低频声压场校准方法)

3-2025_Chinese: Plastics - Thermomechanical analysis(TMA) - Part 3: Determination of penetration temperature (Chinese: 塑料 热机械分析法（TMA） 第3部分：针入温度的测定)

English versions: GB/T 17216-2025

English versions: GB/T 23301-2024

English versions: GB/T 45004-2024

GB/T 45263-2025 Chinese PDF (GB /T45263-2025) GB/T 18649-2024 2-2024_Chinese: Acoustics - Calibration ofGB T 45263 2025_Chinese: Sharing economy Guidelines for provider verification on digital platform (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 45263 2025