Double-drum winch
Drawworks
Drawworks
Drive assembly
Drive assembly and apparatus for hoist
Drive for mine friction hoist
Drive mechanism for cable drums
Drive system for yarder used in double main line logging
Driving machine for lifts
Drum for receiving a rope
Drum hoist
Drum pulley
Drum spar
Drum winches
Dual capstan puller and method
Dual drive system for dragline with power interlock
Dual-drive winch system adapted for well logging applications
Dump block for dragline bucket