英文關鍵字
bascule
bridge
bridgekeeper
close
concrete
construction
downward
drawbridge
dutch
establishing
europe
european
germany
infrastructure
lake
leaf
maritime
medium
motorway
move
moveable
north
open
polder
shot
single
swing
tower
traffic
英文關鍵字
bascule
bridge
bridgekeeper
close
concrete
construction
downward
drawbridge
dutch
establishing
europe
european
germany
infrastructure
lake
leaf
maritime
medium
motorway
move
moveable
north
open
polder
shot
single
swing
tower
traffic