Sanadihii la soo dhaafay, tignoolajiyada qodista ayaa aad u horumartay, mid ka mid ah hal-abuurka muhiimka ah ee keenaya isbeddelkan waa gooyaha PDC. PDC, ama polycrystalline diamond compact, gooyaa waa nooc ka mid ah qalabka wax qodista kaas oo isticmaala isku darka dheeman iyo carbide tungsten si loo hagaajiyo waxqabadka iyo du ...
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