ICS 03.080CCS A 12中华人民共和国国家标准GB/T 44189—2024政务服务便民热线运行指南Guidelines for government service hotline operation2024-06-29 发布2025-01-01 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 ··································································...