Grooved earthworking bit and method of enhancing the life thereo
Ground engaging bit having a hardened tip
Ground excavating apparatus
Ground stabilized transportable drop hammer
Ground water control for an in situ oil shale retort
Ground-working tools for use in power rakes
Guide and drive arrangement for the winning machines of mineral
Guide arrangement for a drum-type mineral cutting machine
Guide for a hewing machine mounted on a conveyor
Guide rail for scraper conveyor of mining machine
Guide-rail assembly for longwall mining apparatus
Guided roofing materials removal apparatus
Guides for mineral mining
Guides for mineral mining machines
Guides for mineral mining machines
Guides for mineral mining machines
Guides for mineral mining machines
Guides for mineral winning machines
Guides for mineral winning ploughs
Guides for mineral winning ploughs