Kapu ya thermos ndi kapu yomwe timagwiritsa ntchito kutenthetsa madzi otentha, koma kwenikweni, kapu ya thermos imakhalanso ndi mphamvu yoteteza kutentha pa zakumwa zotsika kutentha. Komabe, ngakhale zili choncho, musagwiritse ntchito kapu ya thermos kuti musunge zakumwa zoziziritsa kukhosi, madzi a zipatso, ndi zinthu zamkaka monga mkaka, bec...
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