Analysis of information sources in references of the Wikipedia article "區域供暖" in Chinese language version.
During Roman times, warm water was circulated through open trenches to provide heating for buildings and baths in Pompeii.
During Roman times, warm water was circulated through open trenches to provide heating for buildings and baths in Pompeii.
During Roman times, warm water was circulated through open trenches to provide heating for buildings and baths in Pompeii.