... Tube 1.We are manufacturer 2.BW,NW,HW,PW,SW,UW,ZW 3.NX,HW,PX,SX, 4. 46,56 ... shoe bit, reaming shell, diamond reaming shell, TC core bit, TC casing shoe bit, TC shoe bit, Thin Wall Bit, core lifter, core ... in geotechnical applications. DCDMA Casing tube(BW,NW,HW,PW,SW,UW,ZW) & (NX,HX,PX,SX)