英文關鍵字
air
argon
automated
automatic
automotive
business
closeup
conditioners
construction
control
conveyor
danger
electronics
energy
engineering
equipment
factory
fire
gloves
heat
hot
industrial
industry
iron
laser
machine
machinery
manufacture
manufacturing
mechanic
mechanical
metal
metalwork
modern
motion
nobody
plant
production
refrigeration
robot
robotic
slow
spark
steel
technology
tubes
ventilation
welder
work