機器
blade
circle
circular
construction
cut
electric
engineering
equipment
factory
fire
flash
grind
grinder
grinding
hand
hot
industrial
industry
iron
labor
labour
light
manufacture
manufacturing
mechanic
metal
metalwork
power
production
protection
rotate
round
safety
saw
sawing
spark
speed
splashing
steel
technical
technology
tool
tools
welder
welding
wheel
work
worker
workshop