英文關鍵字
arc
bright
connect
construction
craftsman
engineering
equipment
factory
fire
gloves
grinder
heat
helmet
industrial
industry
iron
job
laborer
lifestyle
light
man
manual
manufacture
manufacturing
mask
melt
metal
metalwork
occupation
protection
protective
repair
safety
skill
smoke
spark
steel
technology
tool
welder
welding
work
worker
workman
workshop