Xa kufikwa kwimingxuma kwiiPCBs (iiBhodi zeSekethe eziShicileleyo), umntu angasoloko enomdla malunga nemingxunya emibini ekhethekileyo: Umngxuma we-Counterbore kunye ne-Countersunk hole. Kulula ukubhideka kwaye kulula ukungaqondi ukuba ungumntu we-PCB. Namhlanje, siya kwazisa umahluko phakathi kwe-counterbore kunye ne-countersunk ngeenkcukacha, masiqhubeke sifunda!