機器
barrel
cesspit
cesspool
cistern
clean
cleaner
dirty
drain
drainage
engine
equipment
feces
hole
hose
house
hygiene
industry
lorry
maintenance
manure
outdoors
pipe
pipeline
pump
sanitary
sanitation
septic
septic truck
server
service
sewage
sewerage
shit
sludge
storage
suck liquids
suction
tank
tanker
transportation
truck
trucking
tsar
tube
vacuum
vacuum truck
vehicle
waste
wastewater