英文關鍵字
action
arc
blaze
boring
burn
circle
closeup
cnc
cut
drilling
energy
engineering
engraving
equipment
factory
fire
flames
flat
gas
industrial
industry
laser
light
machine
machinery
machining
manufacture
manufacturing
mechanical
melting
metal
metalwork
nozzle
plasma
precision
processing
production
sheet
spark
steel
technology
tool
torch
treatment
work