zhōng yāng nuǎn qì xì tǒng



mùlù ·yīngwénjièshì ·jìnyící ·gèngduōjiéguǒ... yīngwénjièshì :  system for heating a building from one source by circulating hot water or hot air in pipes or by linked radiators,  central heating jìnyící jí zhōng gōng rè shè bèi