... , NQ, HQ, PQ Drill rodQ series Rod parameter-geological steel pipe-entire length thermal treatment,NQ lathe with former cuttersSpec.UnitBQBNQBHQBPQBOD ... resistance(B series)kn450615625660bore depthm12001000900800QR series Rod parameter-geological steel pipe-entire length thermal treatment, NQ lathe with former cuttersSpec.UnitBRQNRQHRQPRQOD ...