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Injin hardening
DUOLIN yana ba da injin inci a tsaye ko a kwance wanda aka yi amfani da shi don murƙushe sassa daban -daban na inji, kamar shafts, gears, rollers, bututu, fitowar famfo, ɗaukarwa, hakora masu hakowa, da dai sauransu DUOLIN yana ba ku mafita na musamman don ƙarfafa aiki na musamman, kara fa'idodin ku.