機器
agricultural
agriculture
ancient
animal
archaic
collection
cultivation
development
device
draft
equipment
evolution
furrow
history
hoe
human
husbandry
illustration
implement
industry
isolated
machinery
man
mechanical
modern
ox
peasant
plough
plow
plowed
primitive
process
progress
rural
set
soil
technology
till
tillage
tilth
tool
tractor
village
work
worker