機器
abstract
action
angle
burning
business
circular
closeup
danger
disk
electric
energy
engineering
factory
fire
flame
flash
foundry
heat
hot
igniting
industrial
industry
laser
light
machinery
manual
manufacture
manufacturing
metalwork
modern
part
phenomenon
pipe
plasma
power
production
safety
spark
spin
steel
technical
technology
temperature
tool
welding
work
worker
working
workshop
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