機器
agricultural
agriculture
ancient
animal
archaic
bull
bullock
cartoon
cattle
concept
country
cultivation
development
device
draft
equipment
evolution
farm
farmer
farming
husbandry
illustration
implements
industry
isolated
machinery
man
modern
moldboard
ox
peasant
plough
plow
primitive
progress
soil
technology
till
tillage
tractor
village
work
worker