7 MACHINES USED IN MINING AND ROCK ENGINEERING, NAMELY DRILL RIGS, DRILLING MACHINES, ROCK BOLTERS, LOADERS AND HAULERS, EXPLOSIVE CHARGERS, MOBILE LIFTERS, CONCRETE SPRAYERS, MECHANIZED SCALERS AND VARIABLE TRANSPORTERS, ROCK CRUSHERS, MOBILE ROCK CRUSHERS; TRACKBOUND AND TRACKLESS DRILLING AND TUNNELING MACHINES; LONG-HOLE DRILLING MACHINES; FRONT-END- LOADERS; SURFACE DRILLING, TUNNELING, FACE DRILLING, PRODUCTION DRILLING, LONG-HOLE DRILLING, CHARGING, SCALING, BOLTING AND SPRAYING JUMBOS