Iindaba zeMveliso
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Ukhetho olufanelekileyo lwee-PDC Cutters zeMisebenzi yokuQoba
Isitshixo sokukhetha izixhobo zokusika zePDC ezifanelekileyo sikwi "ukufanisa ngokuchanekileyo". Ukubeka oku ngokuthe ngqo, oku kuthetha ukulungelelanisa ngokuchanekileyo iprofayili yejiyometri yomsiki—nokuba luyilo oluthe tyaba phezulu ukuze kubekho isantya esiphezulu sokubhola, uhlobo oluyi-semi-spherical ukuze luhlale ixesha elide,...Funda ngokugqithisileyo
