Daban-daban kayan tagulla, irin su 95, 53, 56, da 62, suna da nau'i daban-daban na jan karfe da zinc, wanda ke shafar kaddarorin abubuwan da ke cikin tagulla, kamar juriya na lalata, ƙarfi, da machinability.Misali, tagulla 95, wanda shine 95% jan karfe da 5% zinc, ana yawan amfani dashi don yin famfo beca ...
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