英文關鍵字
asphalt
city
concrete
cover
dirt
dirty
drain
drainage
garbage
grate
grunge
gutter
industrial
inside
iron
manhole
metal
public
rain
road
rough
sanitation
service
sewage
sewer
sidewalk
storm
street
surface
urban
utility
water
英文關鍵字
asphalt
city
concrete
cover
dirt
dirty
drain
drainage
garbage
grate
grunge
gutter
industrial
inside
iron
manhole
metal
public
rain
road
rough
sanitation
service
sewage
sewer
sidewalk
storm
street
surface
urban
utility
water