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English versions: GB/T 11828
English versions: GB/T 45521-2025
English versions: GB/T 44873-2024
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)
6-2025_Chinese: Plugs
GB/T 45633-2025 Chinese PDF (GB /T45633-2025) GB/T 42596.4-2024 English versions: GB/T 11828GB T 45633 2025_Chinese: Collection and processing of human saliva biomaterial (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 45633 2025
