underground core drilling core chim

Lus piav qhia luv luv:

Qhov chaw ntawm Keeb Kwm: Suav teb
Hom Lub Npe: JCDRILL
Qauv nab npawb: BOU NOU HOU
Hom: Underground Core Drilling
Khoom siv: steel
Siv: underground tshawb nrhiav core drilling
Ntev: 1.5m
Lub npe: Underground Drilling Wireline Core Barrel Head Assembly Overshot