機器
arc
construction
craftsman
engineering
fabricate
fabrication
factory
fire
flash
helmet
hot
industrial
industry
iron
ironworks
labor
laborer
laboring
labourer
light
making
man
manufacture
manufacturing
mask
metal
metalwork
occupation
production
proletarian
protection
repair
safety
skill
skilled
smoke
spark
steel
technical
weld
welded
welder
welding
welding sparks
welding torch
work
worker
working
workshop