miningst.comminingst.com/Longwall/21st Century higher production coal mining... · LONGWALL COAL CUTTING MACHINES THE FUTURE By Dr. Ing. K. Nienhausl and J. Carthew2 ABSTRACT For
Post on 05-Jun-2018
216 Views
Preview:
Transcript
top related
Post on 05-Jun-2018
216 Views
Preview:
Transcript
top related