英文關鍵字
agriculture
background
belt
car
chain
circuit
circuitry
cogwheel
combine
crop
drive
engineering
equipment
farming
gear
generator
grain
harvester
header
homing
industry
landing
machine
machinery
mechanical
moment
pinion
plant
processing
rotational
rural
sprocket
tech
technic
technique
technology
torque
torsion
torsional
tractor
transmission
treatment
turn
twisting
wheel
white