英文關鍵字
blade
circle
disk
electric
engineering
equipment
factory
grind
grinder
grinding
hand
helmet
industrial
industry
iron
light
machine
man
manufacture
manufacturing
mechanic
metal
metalwork
person
plant
power
production
professional
protection
safety
saw
spark
steel
technical
technology
tool
weld
welder
welding
wheel
work
worker
working
workshop