GB/T 39437-2020供排水系统防雷技术规范标准
英文:Technical specification for lightning protection of water supply and drainage system GB/T 39437-2020介绍: 国家标准《供排水系统防雷技...
英文:Technical specification for lightning protection of water supply and drainage system GB/T 39437-2020介绍: 国家标准《供排水系统防雷技...