機器
arc
construction
craftsman
engineering
equipment
fabricate
fabrication
factory
fire
flash
gas
gloves
helmet
hot
industrial
industry
iron
job
labor
laborer
light
man
manual
manufacture
manufacturing
mask
metal
production
protection
protective
repair
safety
skill
skilled
smoke
spark
steel
structure
technical
technology
tool
weld
welded
welder
welding
work
worker
workplace
workshop
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