英文關鍵字
pan
scene
graphite
center
machining
finish
carbon
ball
solid
machine
discharge
electric
cnc
mill
edm
machinery
cutting
tool
tooling
cam
milling
production
manufacturing
mold
industry
industrial
cutter
accuracy
mould
precision
processing
technology
metalwork
mechanical
manufacture
engineering
material
factory
background
cut
finishing
workshop
equipment
process
work
black