... , long propelling stroke, and parallel movement mechanism, the accuracy of drilling blast hole and its efficiency are naturally upgraded, thus auxiliary ... of drifter 5/YGZ705/YGZ706/YGZ706/YGZ706/YGZ706/YGZ708/YGZ70Power type air motor- oil pumpair motor- oil pumpair motor- oil pumpair ... .74.74.74.74.75.7Total weightkg53006300780082009000900012000 Vertical Tunnel Exploring Drilling Rig