英文關鍵字
arc
assembly
auto
automated
automotive
blue
car
construction
craftsman
engineering
erecting
fabricate
fabrication
factory
flash
industrial
industry
labor
laborer
light
making
man
manual
manufacture
manufacturing
mask
metal
metalwork
naval
prefabricate
production
protection
repair
robot
safety
shipyard
skill
skilled
spark
steel
technical
technician
trained
weld
welded
welder
welding
work
worker
workplace