英文關鍵字
arc
background
bright
busy
closeup
construction
conveyor
craftsman
danger
electric
electrode
electrodes
electroplating
environment
equipment
fabricator
factory
fire
flame
gloves
grinding
hangar
hard
heat
high
illuminated
industrial
industry
iron
isolated
liquid
machine
manufacturing
mask
material
metal
plant
process
production
robot
robotic
rod
sparks
steel
technology
welder
welding
work
worker