機器
arc
brilliant
construction
craft
craftsman
cut
cutter
cutting
danger
ductile
engineering
equipment
factory
fire
flame
flash
gas
hand
heat
industrial
industry
iron
job
laser
light
line
manual
manufacturing
metal
occupation
pipe
plasma
plate
production
safety
spark
steel
surface
technology
tool
waterworks
weld
welder
welding
work
worker