Ma Flasks a Dewar amagwiritsidwa ntchito kwambiri m'minda monga kafukufuku wasayansi, mayendedwe azachipatala, kufufuza panja, ndi tsiku ndi tsiku kugwiritsa ntchito kunyumba.
Kusunga kochepa kochepa kwamitengo yotsika kwambiri
