機器
alloy
construction
cutter
danger
electric
electricity
engineering
equipment
fabrication
fabricator
factory
fire
flame
flash
heat
industrial
industry
iron
job
labor
laboring
light
machinery
man
manufacture
manufacturing
mask
mechanical
men
metal
metalwork
person
production
protection
repair
safety
skill
spark
steel
technology
tool
trained
weld
welder
welding
work
worker
workforce
workshop