英文關鍵字
construction
disc
disk
duty
electric
engineering
equipment
fire
flame
hand
heavy
helmet
industrial
industry
ironwork
job
labor
laborer
light
machine
man
manual
mask
mechanic
metal
metalwork
occupation
pipe
power
production
protection
protective
repair
safety
skill
skilled
steel
tech
technical
technology
tool
tools
weld
welder
welding
work
worker
working
workplace
workshop