HEIPROP

APPARATUSES AND MACHINES FOR USE IN UNDERGROUND EXCAVATION AND THE CONSTRUCTION OF TUNNELS AND MINES, NAMELY, HYDRAULICALLY OPERATED SUPPORTS AND HYDRAULIC CYLINDERS FOR USE IN TUNNEL CONSTRUCTION AND MINE CONSTRUCTION; HYDRAULIC MACHINERY FOR USE IN TUBBING OF MINE PITS FOR FACE SUPPORT FOR LONGWALL ADVANCING AND STATIONARY CONSTRUCTION AND FOR TRANSITIONAL CONSTRUCTION OF LONGWALL AND HEADING; STULLS, MINE PROPS AND ADJUSTABLE STRUTS AND SUPPORTS FOR USE IN TUBBING OF MINE PITS, FOR FACE SUPPORT, FOR LONGWALL ADVANCING AND STATIONARY CONSTRUCTION AND FOR TRANSITIONAL CONSTRUCTION OF LONGWALL AND HEADING; MACHINE-DRIVEN APPARATUS AND INSTRUMENTS FOR USE IN UNDERGROUND EXCAVATION AND TUNNEL AND MINE CONSTRUCTION, NAMELY, FOR USE IN MECHANIZED MINE CONSTRUCTION, FOR HYDRAULIC LONGWALL AND HEADING CONSTRUCTION; MACHINES FOR PLACING, REPLACING AND DISPLACING OF MINE CONSTRUCTION MACHINERY AND REPLACEMENT PARTS FOR THE FOREGOING