機器
abrasive
blade
circle
corrund
cut
cutting
design
dirt
disc
electricity
engineering
equipment
factory
fire
flash
garbage
hand
hands
handyman
human
industry
iron
labor
maintenance
material
metal
operator
plant
process
production
profession
red
repair
rotation
safety
saw
shavings
spark
sparks
steel
strength
technology
texture
tool
welding
work
worker
workplace
workshop