mosószer könnyűsúlyú rajtaütés a thermos flask prevents loss or gain of heat by Állatkert éjjel tisztít tékozlás
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Draw a labelled diagram of a thermos flask. Explain how the transfer of heat by conduction, convection and radiation is reduced to minimum in it.
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Draw a labelled diagram of a thermo flask. Explain how the transfer of heat by conduction, convection and radiation is reduced to a minimum in it.
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