Kwanan nan, wasu abokan ciniki sun ce sun sami wasu masu siyar da kaya suna faɗin farashin Carbon / Graphite Raschig Ring, wasu lokuta ana jan hankalinsu ta hanyar ƙarancin farashinsu, wataƙila saboda ba su san wannan ƙimar ingancin kaya, da sauransu.Dukanmu mun sani, da alama ƙananan farashi mai rahusa, amma ingancin kayan su ...
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