英文關鍵字
arc
assembly
construction
craftsman
engineering
equipment
fabricate
fabrication
factory
fire
fix
flash
gloves
hand
helmet
hot
industrial
industry
iron
job
labor
light
machine
man
manual
manufacture
manufacturing
mask
metal
metalwork
process
production
protection
repair
safety
skill
smoke
spark
steel
structure
technical
technology
tool
uniform
weld
welder
welding
work
worker
workshop