HQ pob zeb diamond reaming khau

Lus piav qhia luv luv:

Qhov chaw ntawm Keeb Kwm: Suav teb
Hom Lub Npe: JCDRILL
Qauv nab npawb: BQ, NQ, HQ, PQ
Hom: Wireline ob lub raj reamer
Khoom siv: steel
Siv: kev tshawb nrhiav core drilling
Lub npe: Reaming plhaub