arc
assembly
connect
construction
craft
craftsman
engineering
equipment
fabricate
fabrication
factory
fire
gas
hand
industrial
industry
iron
job
join
labor
laborer
light
man
manufacture
manufacturing
mask
metal
metalwork
protection
repair
safety
skill
skilled
smoke
spark
steel
structure
technical
technology
tool
trained
wear
weld
welded
welder
welding
work
worker
working
workplace