... casing2. Diamond core bits for exploration mining and dam drilling grouting; (They are the AQ, BQ, NQ, HQ, PQ, BQ3, NQ2, NQ3, HQ3, PQ3, TNW, ... and dam drilling grouting; (They are the AQ, BQ, NQ, HQ, PQ, BQ3, NQ2, NQ3, HQ3, PQ3, TNW, NMLC, HMLC, T2 46, T2 56, ... diamonds core bits, synthetic diamonds core bits, PDC bits;8. Drilling rods;9. Core barrels;10. Core lifter and core lifter case; NQ Reaming ...