英文關鍵字
activity
auto
automobile
automotive
car
control
conveyer
conveyor
device
economy
energy
engine
equipment
factory
foundry
indoor
indoors
industrial
industry
line
liquid
machine
machinery
manufacture
manufacturing
mechanic
melting
metal
metallic
modern
motion
nobody
nopeople
part
plant
production
robot
robotic
rotate
spares
steel
technology
transportation
vehicle
weld
work
working