英文關鍵字
arc
arcperson
build
building
construction
craftsman
engineering
entrepreneur
equipment
fabrication
face
factory
fire
fix
hand
heat
industrial
industry
iron
job
labor
laborer
lamp
man
manual
manufacturing
mask
metal
night
person
pipe
pipeline
production
protective
repair
safety
skilled
smoke
steel
structure
suit
technology
trained
tube
utilities
weld
welded
welder
welding
white
work
worker
working