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English versions: GB/T 10059-2023
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 45548-2025
GB/T 21551
English versions: GB/T 18396-2025
GB/T 12705.2-2024 Chinese PDF (GB/T12705.2-2024) GB/T 45501-2025 English versions: GB/T 10059-2023GB T 12705. 2 2024_Chinese: Textiles Methods of testing the down proof property Part 2: Tumble test (Chinese: 2) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 12705. 2 2024
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