ukuphosa, iinxalenye zokwenziwa kunye neendawo zokwakha zentsimbi zokucoca isanti encinci ye-viscous, umbindi wesanti kunye nolusu lwe-oxide. Kwakhona kufanelekile ukucocwa komphezulu kunye nokuqiniswa kwiindawo zonyango lokushisa, ngokukodwa ukucoca ubuncinci, iindonga ezincinci ezingafanelekanga k......
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