機器
agricultural
artist
bangladesh
drink
droplets
ecology
facility
farm
field
fluid
green
ground
handle
helping
human
hygiene
liquid
manual
metal
metallic
nature
oil
old
pipe
pipeline
plumber
public
pump
pure
refreshing
rural
rustic
rusty
school
sky
source
splash
steel
stone
summer
supply
tap
tradition
traditional
tube
tubewell
village
water
well