英文關鍵字
alter
automatic
blue
bright
close
closeup
connect
construction
create
dark
detail
discharge
electrode
engineering
equipment
fabrication
fabricator
factory
fire
flame
fused
hard
heat
hot
industrial
industry
iron
light
manufacture
manufacturing
melt
melted
metal
metalwork
molten
part
power
process
repair
rod
smoke
sparks
steel
technology
torch
weld
welded
welding
work