英文關鍵字
arc
bright
construction
craftsman
electric
engineering
equipment
factory
fire
flame
flash
glove
heat
horizontal
industrial
industry
iron
job
labor
light
man
manufacture
manufacturing
mask
metal
metalwork
occupation
production
protection
protective
safety
skill
smoke
spark
steel
technical
technology
tool
weld
welder
welding
work
worker
working
workshop