钢管热镀锌热工系统节能技术规范Technical specification for energy-saving of hot-dip galvanizing thermal systemfor steel tubesICS 77.010CCS H 04中华人民共和国国家标准GB/T 44553—20242024-09-29 发布2025-04-01 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 ··········································...