英文關鍵字
processing
cnc
automatic
working
metal
technology
metalworking
cutter
manufacturing
manufacture
industry
factory
production
steel
plant
modern
industrial
work
machine
metalwork
precision
process
workshop
mechanical
machining
machinery
part
tool
heavy
engineering
cut
iron
instrument
turning
equipment
rough
automated
cutting
milling
operation
material
lathing
shaving
closeup