Underground old ore gold mine tunnel shaft passage mining technology flooded submerged
Palabras clave
mine,
shaft,
geology,
mining,
heavy,
deposit,
rock,
stone,
tunnel,
gallery,
passage,
ore,
abandoned,
dark,
gold,
iron,
mineral,
industry,
wood,
quarry,
timbering,
cavern,
cave,
timber,
wagon
){kind=link}