英文關鍵字
attention
background
bush
canalization
city
cleaning
close
construction
cover
danger
dangerous
dirty
drain
equipment
fix
green
hatch
hole
industry
iron
line
maintenance
manhole
metal
nature
old
open
outdoor
part
pavement
problem
repair
road
roadway
rusty
sand
sewage
sewer
sewerage
sign
spring
steel
street
theft
ukraine
underground
urban
vintage
water
wood