英文關鍵字
welding
welder
metal
steel
man
spark
manufacturing
industry
engineering
workshop
construction
tool
work
metalwork
equipment
fire
flash
job
mask
production
smoke
tube
iron
pipe
helmet
technical
arc
light
flame
electric
craftsman
bright
diy
employee
skilled
profession
teamwork
technician
builder
craft
male
weld
electrodes
soldered