英文關鍵字
arc
close
construction
craftsman
engineering
equipment
fabric
factory
fire
flash
focused
gloves
industrial
industry
iron
job
labor
laborer
light
machine
man
manufacture
manufacturing
metal
metalwork
production
protection
protective
repair
safety
shop
skill
skilled
smoke
spark
steel
technical
technology
tool
welded
welder
welding
work
worker
workplace
workshop