GB 23394-2024 Chinese PDF GB 31616-2025 English versions: GB 20072-2024

English versions: GB 20072-2024

English versions: GB/T 17643-2025

GB 45672-2025_Chinese: On-board accident emergency call system (Chinese: 车载事故紧急呼叫系统)

GB/T 12385-2025_Chinese: Standard test methods for sealability of gaskets for pipe flanges (Chinese: 管法兰用垫片密封性能试验方法)

English versions: GB 23394-2024

GB 23394-2024 Chinese PDF GB 31616-2025 English versions: GB 20072-2024GB 23394 2024_Chinese: Respiratory protection Positive pressure self contained closed circuit compressed oxygen breathing apparatus (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB 23394 2024