Removable hydraulic apparatus with electric control for multiple
Removal of fine-grained sediments from water bodies
Removal of pillars from a void for explosive expansion toward th
Replaceable cutting bit holder assembly
Replaceable tooth for a digging and breaking tool
Replaceable wear surface for bit support
Residue recovery process and apparatus
Resonant beam for tool driving apparatus
Resonant beam suspension pads
Resonant system speed control
Resonant tool driving apparatus with tool stop
Resonant tool driving system with gap
Resonantly driven vertical impact system
Restoration of a leached underground reservoir
Restoration of uranium solution mining deposits
Resurfacing ice skating rinks
Resurfacing ice skating rinks
Retainer and wear sleeve for rotating mining bits
Retainer clip for cutter bits
Retainer device for auger, roof and the like type bits