Detecting seam boundary using pick sound
Determining the locus of a processing zone in an oil shale retor
Device for cooling the bits of a cutting machine
Device for cooling the bits of cutting machine
Device for preventing collision between part of the cutting arm
Device for protecting selective cutting machines against...
Device for removing gravels and the like from discharged mud in
Doping a retort to determine the locus of a processing zone
Double ended ranging drum shearer and method of controlling work
Double ranging drum cutter having bedrock sensor based on video
Double ranging drum cutter having load controller
Drive system having a pin drive chain for a cutting machine for
Driving system for driving flexible elongate members, such as ch