機器
blade
circle
circular
construction
cut
disc
disk
electric
engineering
equipment
factory
fire
flash
grind
grinder
hand
industrial
industry
iron
job
light
machining
manual
manufacture
manufacturing
mechanic
metal
power
precision
production
protection
rotate
round
safety
saw
spark
speed
spin
steel
technical
technology
tool
turning
welding
wheel
work
worker
workshop