機器
angle
blade
circular
construction
desc
diamond
disk
electric
engineering
equipment
fabrication
factory
grinder
grinding
hand
hazardous
industrial
industry
iron
labor
light
manual
manufacture
manufacturing
metal
metallic
metallurgical
metalworking
part
polishing
power
production
protection
rotate
safety
saw
spark
sparkles
speed
steel
technical
technology
tools
turning
welding
wheel
work
worker
workshops