Points out that a plenty of freezing heat exist in urban sewage and surface waters close to the freezing point in winter.
Points out that a plenty of freezing heat exist in urban sewage and surface waters close to the freezing point in winter.
摘要指出在冬季寒冷地区接近0℃的地表水以及城市污水中，存在着大量可供利用的凝固潜热。