Ukwenza amakhandlela kububugcisa kunye nesayensi, kufuna ukuchaneka, umonde, kunye nezixhobo ezifanelekileyo. Phakathi kwezi zixhobo, i-thermometer iyimfuneko. Ukuqinisekisa ukuba i-wax yakho ifikelela kubushushu obuchanekileyo kwizigaba ezahlukeneyo kubalulekile ekuveliseni amakhandlela akumgangatho ophezulu anokwakheka okugqibeleleyo, ukubonakala...
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