GB/T 19520.22-2023 Chinese PDF (GB/T19520.22-2023) GB/T 45217-2025 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)

2-2025_Chinese: Sterilization of health care products - Microbiological methods - Part 2: Tests of sterility performed in the definition

English versions: GB/T 23453-2025

GB/T 15241

“dry” and “wet” conditions (Chinese: 金属和合金的腐蚀 循环暴露在盐雾、“干”和“湿”条件下的加速试验)

GB/T 19520.22-2023 Chinese PDF (GB/T19520.22-2023) GB/T 45217-2025 2-2024_Chinese: Acoustics - Calibration ofGB T 19520. 22 2023_Chinese: Mechanical structures for electrical and electronic equipment Dimensions of mechanical structures of the 482. 6 mm (19 in) series Part 3 110: Residential racks and cabinets for smart houses (Chinese: 482. 6 mm(19 in) 3 110) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 19520. 22 2023