英文關鍵字
agricultural
agriculture
automated
chain
closeup
converting
crops
engineering
equipment
factory
farming
food
grinding
industrial
industry
machine
machinery
manufacture
manufacturing
mechanical
mill
milling
motor
particles
plant
process
processing
production
rotate
rotating
round
specks
spin
spinning
sucrose
sugar
sugarcane
technology
tool
tools
turning
wheel
work