英文關鍵字
automated
big
brazier
butter
cream
dielectric
electricity
electronics
elements
engine
engineering
equipment
factory
food
gear
heat
heating
huge
industrial
industry
line
machine
manufacturing
margarine
mechanical
metal
milk
pipe
production
reducer
rotate
rotor
rusty
spiral
stator
steel
sunflower
technology
temperature
treatment
turnover
working
workshop