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English versions: GB 17440-2025
English versions: GB/T 22248-2025
English versions: GB/T 22320-2025
1 encoding rules - Part 1: Specification of Basic Encoding Rules(BER)
GB/T 23713
GB 23394-2024 Chinese PDF GB/T 12417.1-2024 English versions: GB 17440-2025GB 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
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