1. Hanyar tsarkakewa na albarkatun ƙasa Saboda WBN, HBN, pyrophyllite, graphite, magnesium, iron da sauran ƙazanta sun kasance a cikin foda na CBN;Bugu da ƙari, shi da foda mai ɗaure ya ƙunshi oxygen adsorbed, tururin ruwa, da dai sauransu, wanda ba shi da kyau ga sintering.Don haka, hanyar tsarkakewa ta r...
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