135794 ⎘
Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam Machines for making slits with additional arrangements for drilling
Six-Arm Tunneling and Anchoring Machine
#2Mining machine applicable to fluidized mining of ore bodies and mining method
#3Drilling and bursting heading machine
#4Method and apparatus for recovering subsurface free mercury and decontaminating a substrate