Izinto zombhobho wensimbi ezingenamthungo: Ipayipi lensimbi elingenamthungo lenziwa nge-ingot yensimbi noma i-billet yeshubhu eqinile ngokubhoboza ibe yishubhu eliqinile, bese ligoqwa ngokushisa, ligoqwe ngokubandayo noma lidonswe ngokubandayo. Izinto zombhobho ngokuvamile zenziwe ngensimbi yekhabhoni esezingeni eliphezulu njenge-10, 20, 30, 35, 45, i-alloy ephansi...
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