I-plate yokwahlula, i-groove yokuqala ye-clamping yenziwe kwi-plate yokwahlula, kwaye i-clamping groove yesibini yenziwe kwi-plate plate;apho, umqolo obambeneyo wokuqala ubekwe kumda wepleyiti yokwahlulahlula, ngoko ke umjelo obandakanyayo wesibini ubekwe ngaphezulu kwepleyiti eyahlulayo.