英文關鍵字
aircraft
airplane
argonarc
conducting
construction
engine
factory
fasteners
flash
heavy
industrial
industry
man
mask
metal
metallic
metalworking
nozzle
part
plant
process
processing
producing
product
professional
protective
repairing
skilled
smoke
spark
sparks
splash
steel
technician
technology
torch
uniform
weld
welder
welding
work
worker
working
workman
workshop