ICS07.060CCSD14DB61陕西省地方标准DB61/T1649—2023浅层地源热泵系统工程勘察技术规范Technicalspecificationforengineeringexplorationofshallowground-sourceheatpumpsystems2023-03-15发布2023-04-15实施陕西省市场监督管理局发布DB61/T1649—2023I目次前言.......................................................................................................................
