arc
confined
construction
craftsman
engineering
equipment
fabricate
fabrication
factory
fire
flash
gas
hot
industrial
industry
job
labor
laborer
light
man
manufacture
manufacturing
mask
metal
offshore
oil
pipe
pipeline
protection
protective
repair
safety
skill
skilled
smoke
space
spark
steel
structure
technical
tool
weld
welded
welder
welding
work
worker
working
workplace
yard