7 UNDERGROUND MINING MACHINES, NAMELY CHAIN-TYPE HAULAGE CONVEYORS, ARMORED FACE CONVEYORS, STAGE LOADERS, CONVEYOR DRIVE HEADS AND TAILS, CONVEYOR LINE PANS, HEAVY DUTY CONVEYOR DRIVE GEAR BOXES, CHAIN-TYPE CONVEYOR TENSIONERS, CRUSHERS, SHEARERS, ROOF SUPPORTS, SHIELDS, AND PARTS THEROF