Method of and an arrangement for longwall mining
Method of and apparatus for collecting peat from peat field
Method of and apparatus for cutting peat
Method of and apparatus for horizontally and vertically...
Method of and apparatus for hydraulic mining
Method of barge mining tar sands
Method of controlling long term safety of underground entry...
Method of controlling the working motion of a cutting tool...
Method of cracking rock material, and breaking device
Method of cutting and cutting rotative bit
Method of exploitation of a nodule deposit on a sea floor...
Method of exposing minerals in open-cut mining
Method of extracting coal
Method of extraction of nodular sediments or the like from...
Method of forming carbon dioxide mixtures miscible with...
Method of fracturing rock or similar material
Method of hydraulically mining underground materials
Method of mining
Method of mining and separating coal in substantially...
Method of mining bedded mineral deposits with hydraulic...