Title: Chugŏ sŏngnŭng tŭnggŭp hyangsang ŭl wihan taginŭng tʻonghap ondol sisŭtʻem kaebal mit siryonghwa yŏnʼgu pogosŏ
Subjects: Ondol, Heating and ventilation, Dwellings, Hot-air heating
Places: Korea (South)