Umbhobho odityanisiweyo we-Spiral (SSAW) ukususwa komhlwa kunye nenkqubo yokunqanda ukubola: Ukususwa komhlwa yinxalenye ebalulekileyo yenkqubo yombhobho yokunqanda ukudumba. Okwangoku, kukho iindlela ezininzi zokususa i-rust, ezifana nokususwa kwe-rust manual, ukuqhuma isanti kunye nokususwa kwe-rust pickling, njl. Phakathi kwazo, i-rust manual ...
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