Step Drag Drill Bits Chevron Drag Bits con Carburi di Tungsteno2019-08-14 15:20:16 |
305mm Chevron Step Drag Bits per la trivellazione di sabbia argillosa2020-12-15 11:41:21 |
203mm Drag Drill Bit Three Wings API 3 1/2" Step Drag Bits per Ming Drilling2019-08-14 15:20:16 |