Ibice bito hamwe no gusubiramo ibishishwa

Ibisobanuro bigufi:

Aho bakomoka: Ubushinwa
Izina ryikirango: JCDRILL
Umubare w'icyitegererezo: AQ BQ-0.5 BQ NQ NQ + 2 HQ HQ + 2 PQ SQ
Ubwoko: Multi-Rings Reamer
Ibikoresho: ibyuma
Koresha: ubushakashatsi bwibanze
Izina: Gusubiramo igikonoshwa