英文關鍵字
blue
bright
closeup
construction
danger
dangerous
darkness
energy
engineering
equipment
experienced
fabrication
factory
fire
flashes
glow
heat
hot
industrial
industry
iron
job
light
machine
manual
manufacture
manufacturing
metal
metalwork
nozzle
performing
process
production
repair
skill
smoke
spark
steel
technical
technology
tool
unit
weld
welder
welding
work
worker
workshop