arc
assembly
construction
craftsman
engineering
equipment
fabrication
factory
fire
flame
flash
gas
heat
hot
industrial
industry
iron
job
labor
laborer
light
man
manual
manufacture
manufacturing
mask
metal
metalwork
mig
occupation
production
protection
repair
safety
skill
smoke
spark
steel
structure
technical
technology
tool
torch
trained
weld
welder
welding
work
worker
workshop
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