Qhov chaw ntawm Keeb Kwm: Suav tebHom Lub Npe: JCDRILLQauv nab npawb: BQU NQU HQUHom: Underground Core DrillingKhoom siv: HlauSiv: Underground core drillingNtev: 1.5mLub npe: Core Drilling Wireline Core Barrel Head Assembly Overshot