AQ, BQ, NQ, HQ, PQ
Customized
AISI, API
Customized
Core Drill Bit
Diamond
Well Drilling, PCB Drilling, Metal Drilling
Drilling Equipment
Diamond Core Bit
Geological Survey
Clay,Hard Sandstone,Syenite,Quartzite,etc
BEST
Standard Protective Packaging
Customized
China
8207191000