GB/T 3836.22-2023 Chinese PDF (GB/T3836.22-2023) GB/T 21461.2-2023 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)

English versions: GB/T 44911-2024

English versions: GB/T 34430

English versions: GB/T 44929-2024

GB/T 45573-2025_Chinese: Evaluation and measurement methods for vibration level of gas fuel combustion chambers (Chinese: 气体燃料燃烧室的振动等级评价及测量方法)

GB/T 3836.22-2023 Chinese PDF (GB/T3836.22-2023) GB/T 21461.2-2023 2-2024_Chinese: Acoustics - Calibration ofGB T 3836. 22 2023_Chinese: Explosive atmospheres Part 22: Protection of equipment and transmission system using optical radiation (Chinese: 22) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 3836. 22 2023