arc
closeup
construction
craftsman
engineering
equipment
fabrication
factory
fire
flame
flash
gas
heat
heavy
hot
industrial
industry
iron
job
labor
laborer
light
man
manual
manufacture
manufacturing
mask
metal
metalwork
occupation
person
production
protection
protective
repair
safety
skill
skilled
smoke
spark
steel
technology
tool
weld
welder
welding
work
worker
working
workplace