Shear-type loader for a tunnel and gallery excavator
Shearer loader for underground mining operation
Shearer-loader drive subassembly and guide shoe for it
Shearing machine with movable shearing drum and conveyor
Shearing machine with roof-bolt drilling and setting devices
Shield advancing machine
Shield assemblies for installation in under-ground roadways and
Shield machine
Shield tunnel boring machine
Shield tunnel boring machine
Shield tunneling machine
Shield tunneling machine
Shield tunneling machine
Shield tunneling machine and earth removing apparatus therefor
Shield tunneling method and shield tunneling machine
Shield tunneling with optional section and machine
Shield tunnelling machine
Shield type tunneling apparatus
Shield unit
Shield-type tunneling machine with toggle controlled bit plates