Ishidi likathayela ophahleni lukathayela, elaziwa nangokuthi ishidi likathayela noma ishidi lensimbi elimhlophe, liyishidi eligoqekayo elibandayo eligoqwayo elishisayo nelinesi. Ingaphezulu lepuleti lensimbi lihle, linephethini ye-zinc crystal block noma yeqabunga. I-zinc coating iqinile futhi inokumelana nokugqwala okuhle kakhulu komkhathi. Ngesikhathi esifanayo, ipuleti lensimbi libuye libe nokusebenza okuhle kwe-welding kanye nokusebenza okubandayo kokwenza.
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