Ngoku ukufakwa kushishino ikakhulu kusetyenziswa indlela yokubumba, i-DHDZ ibonelela ngomgangatho ophezulu wokubunjwa, ngoku xa kusenziwa, zeziphi izinto ezisetyenziswayo?Izinto zokubumba ziyi-carbon steel kunye ne-alloy steel, ilandelwa yi-aluminium, i-magnesium, ithusi, i-titanium kunye ne-alloys yazo.Imeko yokuqala ...
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