Laser-based controller for adjusting the height of a...
Launch vehicle for continuous mining apparatus
Leaching methods and apparatus
Life protector enclosure for mines
Linear cutting rotary head continuous mining machine
Linear impact ripper apparatus
Liquid discharge apparatus for a shearing-loader type mining mac
Liquid seal for production level bulkhead for in situ oil shale
Lixiviant recirculator for in situ mining
Lock assembly for earthworking apparatus
Locking device for mining machine trim chain take-up
Locking fixture
Locking fixture for a degradation assembly
Long range multiple point wireless control and monitoring system
Long wall mining apparatus guide structure
Long-wall mining machine with a working chain
Longwall canted drum mining machine
Longwall coal cutter and loader
Longwall coal mining machine with plural cutters on sub-ranging
Longwall cutter drum having reduced production of dust