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GB/T 45323-2025_Chinese: Coding rules for urban heating system identification (Chinese: 城镇供热系统标识编码规则)
GB/T 45257-2025_Chinese: Press and publication - Knowledge services - Extraction and marking up of knowledge element (Chinese: 新闻出版 知识服务 知识元提取与标引)
English versions: GB/T 32935-2025
English versions: GB/T 26711-2024
English versions: YY/T 1686-2024
GB/T 5612-2025 Chinese PDF (GB /T5612-2025) GB/T 45232-2025 GB/T 45323-2025_Chinese: Coding rules forGB T 5612 2025_Chinese: Designation of cast irons (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 5612 2025
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