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GalvanizedcsteelIzicelo zisetyenziselwa inkxaso yezakhiwo kwizakhiwo.Okuqhelekileyoumjelo c owenziwe ngamaziI-purlins zizinto eziphambili zezakhiwo zophahla.Iindonga zophahla zixhaswa mhlawumbi ngamaplanga okanye iindonga zesakhiwo kwaye umgangatho wophahla ubekwe phezu kwee-purlins.