GB/T 4130.2-2024 Chinese PDF (GB /T4130.2-2024) GB/T 33920-2025 English versions: GB/T 32158-2025

English versions: GB/T 32158-2025

GB/T 17591-2025_Chinese: Flame retardant fabrics (Chinese: 阻燃织物)

GB 45185-2024_Chinese: Optometry products - Safety technical specifications of finished spectacles (Chinese: 眼视光产品 成品眼镜安全技术规范)

GB/T 43707-2025_Chinese: Scientific data provenance metadata (Chinese: 科学数据溯源元数据)

GB/T 44953-2024_Chinese: Technical specification for lightning disaster investigation (Chinese: 雷电灾害调查技术规范)

GB/T 4130.2-2024 Chinese PDF (GB /T4130.2-2024) GB/T 33920-2025 English versions: GB/T 32158-2025GB 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