機器
abandoned
aqua
architecture
balls
bath
bathroom
bathtub
black
bottleneck
brass oxide
calcification
calcified
calcium
carbonate
chain
chrome
clogged
damp
decalcification
deposits
dingy
dirt
dirty
drinking water
equipment
failure
faucet
fitter
fungus
grout
grouted
growing
grubby
hard
house
household
housework
indoor
joints
lime
lime deposits
limescale
metal
mineral
mold
moldy
nasty
plumber
problem
protective
restroom
rust
sanitary
scale
sediment
shower
sink
soiled
spore
stopper
strainer
tap
tile
toilet
toxic
toxin
tub
unclean
unwashed
washbasin
water
water tap