英文關鍵字
arch
architecture
big
birds
bridge
city
column
concrete
construction
embankment
engineering
equipment
fragment
frame
freeway
grand
great
highway
industry
iron
metal
modern
moscow
outdoor
overpass
pan
pier
pillar
quay
reconstruction
reflection
renovation
road
safety
sailing
ship
site
steel
street
sunny
support
technology
traffic
transport
transportation
under
urban
water
way
work