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background
bright
circle
circular
construction
cut
disc
disk
electric
engineering
equipment
factory
flash
grind
grinder
grinding
hand
industrial
industry
iron
job
light
machine
man
manual
manufacture
manufacturing
mechanic
metal
metalwork
part
power
production
protection
round
safety
saw
sawing
spark
sparks
speed
steel
technical
technology
tool
welding
wheel
work
worker
workshop