機器
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blade
circle
circular
construction
cut
cutting
diamond
disc
drill
electric
engineering
equipment
factory
flash
grind
grinder
hand
industrial
industry
iron
job
light
man
manufacture
manufacturing
mechanic
metal
power
production
protection
round
safety
saw
sawing
spark
speed
steel
technical
technology
tool
tools
welding
wheel
work
worker
workshop