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英文關鍵字
blue
artificial
bright
equipment
metal
light
steel
protection
electric
industrial
power
technology
frame
Men
heavy
construction
industry
working
with
occupation
work
job
flame
make
grip
metallic
protective
safety
manufacturing
in
iron
torch
Arc
Eyewear
lighting
repairing
workshop
worker
mask
manufacture
factory
workwear
sparks
craft
the
welding
employment
welder
ark