Akwai nau'ikan bututun ƙarfe maras sumul iri biyu, mai zafi-tsoma galvanizing (zafi-tsoma galvanizing) da galvanizing-tsoma sanyi (electro-galvanizing). Hot-tsoma galvanizing yana da kauri galvanized Layer, wanda yana da abũbuwan amfãni daga uniform rufi, karfi adhesion, da kuma dogon sabis rayuwa. Koyaya, cos ...
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