機器
appliance
basin
building
canalization
clean
connect
connection
connector
dirty
dish
dishwasher
drain
drainage
fitting
flexible
floor
gas
home
house
household
industry
isolated
kitchen
metal
part
pipe
pipeline
piping
plastic
plumber
plumbing
pvc
sanitary
service
sewage
sewer
sewerage
sink
system
technology
tube
valve
wash
washer
washing
waste
wastewater
water