... we can provide1. AQ rod, BQ rod, NQ rod, HQ rod, AW rod, BW rod and casing2. Diamond core bits for exploration mining and ... dam drilling grouting; (They are the AQ, BQ, NQ, HQ, PQ, BQ3, NQ2, NQ3, HQ3 ... exploration mining and dam drilling grouting; (They are the AQ, BQ, NQ, HQ, PQ, BQ3, NQ2, NQ3, HQ3, PQ3, TNW, NMLC, HMLC, T2 46 ...