Menene halaye halaye na Q690D babban ƙarfin ƙarfe farantin karfe?Q690D farantin karfe mai ƙarfi mai ƙarfi shine farantin karfe mai ƙarfi mai ƙarfi mai sanyi wanda manyan abubuwansa sune carbon, silicon, manganese, phosphorus, sulfur, chromium, nickel, molybdenum da sauran abubuwa.Idan aka kwatanta da talakawa...
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