英文關鍵字
angle
blade
circle
circular
construction
electric
engineering
equipment
factory
fire
fix
fixing
grind
grinder
grinding
industrial
industry
ink
iron
job
labor
laborer
man
manufacture
manufacturing
mechanic
metal
metallic
motor
people
power
production
repair
safety
saw
service
spark
sparks
steel
tattoo
technician
technology
tool
transport
welding
work
worker
workshop