英文關鍵字
construction
cut
cutting
electrode
factory
fast
gas
gloves
hand
manufacturing
metal
piece
pipe
plumbing
skill
sparks
stand
steel
technology
tool
torch
tube
visor
weld
welder
welding
work
worker
英文關鍵字
construction
cut
cutting
electrode
factory
fast
gas
gloves
hand
manufacturing
metal
piece
pipe
plumbing
skill
sparks
stand
steel
technology
tool
torch
tube
visor
weld
welder
welding
work
worker