Copper-free gubar yana da babban m m, ba zai iya maye gurbin hydrogen a cikin ruwa, kuma yana da kyau kwarai lalata juriya a cikin yanayi, ruwa mai tsabta, ruwan teku, wadanda ba oxidizing acid, alkali, gishiri bayani, Organic acid matsakaici da ƙasa, amma jan karfe ne sauƙi oxidized , lokacin da zafin jiki ne mai girma ...
Kara karantawa