AQ, BQ, NQ, NQ3, HQ, HQ3, PQ, PQ3
Metal Drilling, Core Drill
Bq Bq3 Nq Nq2 Nq3 Hq Hq3 Pq Pq3
Geotechnical/Mining Exploration
Sinter
Rock Core Drilling
Drilling Equipment
Geological Survey
Impregnated Diamond Bit
Clay,Hard Sandstone,Syenite,Quartzite,etc
Natural Surface and Impregnated
Carton/Wooden Case
BQ, NQ, HQ, PQ