英文關鍵字
acetylene
alloy
arc
argon
blue
craft
craftsman
electric
electricity
electrode
engineering
fabricate
fabrication
factory
fire
flame
gas
heat
helmet
hot
industrial
industry
iron
job
laborer
laboring
manufacture
manufacturing
mask
metal
metalwork
mig
production
protection
smoke
spark
tool
torch
weld
welded
welder
welding
work
worker
workforce
working
workplace
workshop