GB/T 4214.21-2025 Chinese PDF (GB /T4214.21-2025) GB/T 22211-2025 English versions: GB 35181-2025

English versions: GB 35181-2025

English versions: GB/T 33920-2025

GB 23394-2024_Chinese: Respiratory protection - Positive pressure self-contained closed-circuit compressed oxygen breathing apparatus (Chinese: 呼吸防护 正压式自给闭路压缩氧气呼吸器)

GB/T 25820-2025_Chinese: Steel strapping for packaging (Chinese: 包装用钢带)

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)

GB/T 4214.21-2025 Chinese PDF (GB /T4214.21-2025) GB/T 22211-2025 English versions: GB 35181-2025GB T 4214. 21 2025_Chinese: Test method for noise of household and similar electrical appliances Part 21: Particular requirements for oral hygiene appliances (Chinese: 21) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 4214. 21 2025