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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)
English versions: GB/T 45611-2025
English versions: GB 45186-2024
English versions: GB/T 45468-2025
GB/T 12916-2024 Chinese PDF (GB/T12916-2024) GB 4717-2024 2-2024_Chinese: Acoustics - Calibration ofGB T 12916 2024_Chinese: Specification for marine metallic propeller (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 12916 2024
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