金属産業
construction industry
craftsman
craftsmanship
engineer
equipment
expertise
factory
fire is a natural phenomenon
flame
heat temperature
human hand
industrial equipment
industry
iron metal
machines
manual worker
mechanic
men
metal
metal worker
metalwork
molten
one person
people
production
profession
protective mask work clothes
protective work clothes
repair
safety glasses
safety gloves
smoke physical structure
spark
sparks
steel
technics
technologies
uniform
welder
welding
welding flame
welding mask
work
work tools
workshop
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