Method for mining mineral raw materials of high thickness of strata
PL361415A1
Method for reinforcing damaged segments of the tubbing
PL355952A1
Method of recovery of cobalt, copper and other metals from oxide ores
PL355440A1
Method of safeguarding rolling stock for transportation within sloped mine excavations and safety device for rolling stock within sloped mine excavations
PL350506A1
Dehydrating column and method of building same
PL344963A1
Method of and hydrocyclone for recovering metals and their ores from flotation wastes during a process of cleaning up flotation headings
PL342328A1
Method fo measuring concentration of copper ions in industrial electrolytes
PL341922A1
Method of and system for measuring concentration of active bone glue in industrial electrolytes
PL339878A1
Method of smelting copper ore headings in a suspension-type furnace
PL339684A1
Apparatus for changing spacing of workpieces while processing them
PL334981A1
Method of and apparatus for making multiple-point measurements of industrial electrolyte concentration
PL334506A1
Apparatus for automatically lowering welding machine idling voltages
PL191288B1
Mining anchor
PL331966A1
Method of mining mineral deposits
PL331953A1
Method of and system for measuring concentration of sulphuric acid in industrial electrolytes
PL331952A1
Method of and system for measuring concentration of thiourea in industrial electrolytes
PL330966A1
Method of cleanly getting mineral deposits by pillar-and-stall working
PL330561A1
Electro-hydraulic transducer for use in crushing hard mineral materials in particular copper ores
PL330562A1
Crushing head for electro-hydraulic disintegration of hard materials in particular copper ores
