機器
arc
automatic
background
black
construction
device
dirty
electricity
engineering
equipment
eye
glass
guard
hat
helmet
industrial
industry
instrument
isolated
labor
lcd
lens
manufacture
mask
mobile
nobody
object
occupation
plastic
plug
professional
protect
protection
protective
repair
safety
security
shield
skilled
technical
technology
tool
wear
weld
welded
welder
welding
welding mask
work