AQ, BQ, NQ, NQ3, HQ, HQ3, PQ, PQ3
Metal Drilling, Masonry Drilling, Well Drilling, Core Drilling
Cr-Mo Steel, 4130
Heat Treatment
Rock Coring Survey
Iron Bundle
Geological Exploration
Pi, Metric, Dcdma etc.
Wireline Core Barrel Assembly
Rock Coring Drilling Rod
Medium, Hard, Hard Rock Formation
Nude/Wooden Case/Carton