機器
accessory
automatic
background
black
close up
closeup
contact
electrode
equipment
fitter
fix
gas
gear
helmet
industrial
industry
instrument
inverter
iron
locksmith
magnet
male
man
manufacture
mask
mass
metal
metalwork
minus
part
people
person
piece
pipe
profile
repair
semi
service
supply
terminal
tool
weld
welder
welding
work