welders working at dangerous heights on grey painted steel roof truss.
Palabras clave
safety,
steel,
welding,
engineering,
factory,
protection,
industrial,
welder,
industry,
man,
construction,
equipment,
metal,
glove,
job,
manufacturing,
mask,
production,
spark,
structure,
men at work,
workshop,
arc,
person,
torch,
work,
craftsman,
hot,
light,
metalwork,
roof,
iron,
assembly,
brush,
connection,
duty,
engineer,
fire,
flash,
gas,
group,
heat,
helmet,
horizontal,
installation,
labor,
manufacture,
material,
metallic
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