天津市建委节能办、天津市太阳能学会、天津大学机械学院热能工程系等3个单位对来自北京、天津、山东、河北等4个省市的近30家与土壤源热泵技术相关的企业进行了问卷调查,欲知问卷调查成果,敬请阅读此文。 Energy-saving Office of Tianjin Municipal Construction Committee, Solar Energy Society of Tianjin, Department of Thermal Engineering of Tianjin University School of Mechanical Engineering and other three units from Beijing, Tianjin, Shandong, Hebei and other provinces and municipalities nearly 30 and ground-source heat pump technology-related businesses Questionnaire, for the survey results, please read this article.