1. Kuchenesa nzira yezvinhu zvakasvibirira Nokuti WBN, HBN, pyrophyllite, graphite, magnesium, iron uye mamwe matsvina anoramba ari muCBN powder;Mukuwedzera, iyo uye binder powder ine adsorbed oxygen, mhute yemvura, nezvimwewo, izvo zvisingafadzi kunyura.Naizvozvo, nzira yekuchenesa nayo r...
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