Miner Wearing Headlamp Digging Coal Seam in Dark Underground Tunnel
Palabras clave
coal,
miner,
mining,
underground,
headlamp,
industrial,
construction,
machinery,
equipment,
men at work,
labor,
energy,
resource,
extraction,
digging,
tunnel,
darkness,
hard hat,
safety,
profession,
manual,
seam,
illumination,
engineering,
occupation,
excavation,
geology,
fuel,
power
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