英文關鍵字
train
wc
railway
toilet
restroom
washroom
lavatory
sink
hygiene
transport
sanitary
public
modern
wagon
nobody
travel
inside
railroad
clean
water
indoor
seat
basin
drain
metal
closet
washbasin
wash
vacuum
flush
comfort
liquid
ship
convenience
unhygienic
washbowl
hole
metallic
splash
automatic
vacuuming
vertical
sucked
cleaning