ICS35.240.60CCSR8921辽宁省地方标准DB21/T4121—2025普通国省干线重要节点及路段视频设施建设技术规程Constructionspecificationofhighwayvideosurveillanceonimportantnodesandroadsections2025-03-30发布2025-04-30实施辽宁省市场监督管理局发布www.bzfxw.comwww.bzfxw.comDB21/T4121—2025I目次前言.................................................................................II1范围...............................
