ICS13.220CCSC80DB21辽宁省地方标准DB21/T3942—2024建筑消防设施维护保养技术规程Technicalcodeofpracticeformaintenanceofbuildingfirefightingfacilities2024-03-30发布2024-04-30实施辽宁省市场监督管理局发布DB21/T3942—2024I目次前言..................................................................................II1范围.................................................
