英文關鍵字
agricultural
agriculture
and
arable
axles
beet
beets
belt
cleaned
cleaning
clip
combine
compared
contemporary
conveyor
crop
cultivated
day
development
directly
dirt
equipment
exterior
farm
farmer
field
food
for
harvest
harvester
heap
industry
land
large
lighting
loading
machine
machinery
machines
mechanical
modern
natural
part
processing
purification
ramp
real
refinery
root
rotational
separation
speed
sugar
technology
the
time
tractor
transportation
truck
turnips
using
video
with
workhorse