英文關鍵字
beam
burn
burning
cleaning
contactless
corrosion
equipment
factory
future
gray
handle
heat
human
industrial
industry
innovation
laser
machine
machinery
man
metal
metallic
method
modern
new
noncontact
people
person
physics
plasma
ray
removal
remove
remover
rust
rusty
sparkles
sparkling
sparkly
sparks
steel
surface
technician
tool