機器
abstract
action
background
black
blue
bright
brilliant
closeup
construction
danger
dangerous
dark
electric
electrode
equipment
factory
fire
flame
flash
fusion
hand
heat
hot
industry
iron
job
labor
light
manufacture
manufacturing
metal
occupation
old
power
production
protection
repairing
safety
smoke
spark
steel
technology
tool
weld
welder
welding
wire
work
worker