Iimveliso zisetyenziselwa uhlalutyo lwesinyithi oluxabisekileyo, ukuvavanywa kwemigodi, ukuvavanywa kwezimbiwa kunye nokunyanzela kwegolide. Banokuchasana ngokugqwesileyo ngokuchasene nohlaselo lwe-flux, ukhukuliseko, ukuqhekeza kunye nothuso lwe-thermal.
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