英文關鍵字
circular
cnc
construction
cut
detail
diamond
electric
engineering
equipment
fabrication
factory
fire
flash
grind
grinder
grinding
heavy
industrial
industry
iron
job
labor
lathe
light
machine
machinery
manual
manufacture
manufacturing
mechanic
metal
metalworking
person
plant
power
production
rotation
saw
spark
steel
technical
technology
tool
tools
welding
wheel
work
worker
workpiece
workshop