英文關鍵字
arc
bright
close
closeup
clothes
device
electric
electrode
energy
engineering
equipment
gloves
hand
helmet
holder
hot
ignition
industrial
industry
inside
iron
machine
manufacture
master
metal
metalwork
pipe
power
profession
profile
protection
services
smoke
spark
specialist
steelwork
technique
technology
ukraine
weld
welder
welding
work
worker