1. Njira yoyeretsera zipangizo Chifukwa WBN, HBN, pyrophyllite, graphite, magnesium, iron ndi zonyansa zina zimakhalabe mu ufa wa CBN;Komanso, izo ndi binder ufa muli adsorbed mpweya, nthunzi madzi, etc., amene si yabwino kwa sintering.Chifukwa chake, njira yoyeretsera ...
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