... applied in different areas of ground and underground.1. Drill rod of hydraulic drilling jumboR25,R28 ... ,R32,R35,T38,thread,hexagonal drilling rod,circular rod 25 square, 28 square, 32 square, ... products are quick drill rod and general drill rod.2.Drill rod of hydraulic drill vehicle ... mining underground R32, T38, T45, T51 thread, circular rod, diameter 32mm, 39mm, 46mm, 52mm, length 915mm, ...