機器
beam
blade
circle
circular
cut
diamond
disc
disk
drill
electric
engineering
equipment
factory
flash
grind
grinder
hand
industry
iron
light
manual
manufacture
manufacturing
metal
metal pipe
metal sawing
pipe
power
production
protection
rotate
round
safety
saw
sawing
spark
sparks
speed
spin
steel
technical
technology
tool
turning
welding
wheel
work
worker
workshop