Qhov chaw ntawm Keeb Kwm: Suav tebHom Lub Npe: JCDRILLQauv nab npawb: AQ BQ-0.5 BQ NQ NQ + 2 HQ HQ + 2 PQ SQHom: Multi-Rings ReamerKhoom siv: steelSiv: kev tshawb nrhiav core drillingLub npe: Reaming plhaub