ICS 91.140.10CCS P 46GB/T 45323—2025城镇供热系统标识编码规则Coding rules for urban heating system identification2025⁃02⁃28 发布2025⁃09⁃01 实施国家市场监督管理总局国家标准化管理委员会发布目　　次前言··········································································...