Worker work on concrete , man with orange vest and orange hard hat .
Palabras clave
men at work,
civilisation,
engineer,
construction,
building,
people,
wall,
architecture,
industry,
create,
build,
hard hat,
helmet,
safety,
vest,
concrete,
crane,
ladder,
mining,
street,
road,
town,
civil,
city,
tower,
pipe,
system,
electricity,
tunnel,
infrastructure,
cement,
environment,
asphalt,
maintenance,
mechanic,
machinery,
engine,
architect,
employer,
employee,
job,
labor,
land,
modern,
convenience,
structure
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