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English versions: GB/T 18936-2025
GB/T 17554
English versions: GB/T 28559-2025
4-2025_Chinese: Reference conditions and procedures for testing industrial and process measurement transmitters - Part 4: Specific procedures for level transmitters (Chinese: 工业过程测量变送器试验的参比条件和程序 第4部分：物位变送器的特定程序)
English versions: GB 28380-2025
GB/T 4130.2-2024 Chinese PDF (GB /T4130.2-2024) GB/T 19799.3-2025 English versions: GB/T 18936-2025GB T 4130. 2 2024_Chinese: Acoustics Calibration of hydrophones Part 2: Procedures for low frequency pressure calibration (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 4130. 2 2024
