Narrow gauge railroad in the underground mine horizon. Technologies of mining of minerals by the underground method. Underground mine for mining ore
Palabras clave
corridor,
coal,
lighted,
streetcar,
railway,
light,
iron,
deep,
train,
dungeon,
old,
tunnel,
dark,
iron ore,
metal,
production,
heavy,
copper,
rock,
rail,
technology,
dig,
danger,
inside,
shoveling,
modern,
excavation,
exploration,
equipment,
engineering,
discovery,
machine,
mineral,
miner,
geology,
gold,
mineral,
mine,
cave,
ore,
stone,
underground,
industrial,
architecture,
arch,
building,
station
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