Collapsible cushion
Compressed air conservation kit
Connector
Container for forming a barrier in an enclosed environment
Control system for positioning extensible pipeline systems
Conveyance device
Conveying excavated material from the site of underground...
Conveyor-displacing system and method for mining operation
Conveyors for mineral mining installations
Cross-linking titanium and zirconium chelates and their use
Device and a method for drainage of water from rock caves
Device and method for closing off a mine gallery especially...
Device for shielding ground workings with means for...
Disposal of the residue of the exhaust gas washers of...
Door system for a mine stopping
Double-wall underground container for storing liquids and...
Drainage system for tunnels
Drift control for resinous binders
Drop manhole precast encasement
Dust catcher