英文關鍵字
britain
canal
construction
doors
engineering
england
europe
flow
gate
historic
leak
leaking
lock
navigation
old
outdoors
overflow
river
sluice
stream
travel
water
weir
英文關鍵字
britain
canal
construction
doors
engineering
england
europe
flow
gate
historic
leak
leaking
lock
navigation
old
outdoors
overflow
river
sluice
stream
travel
water
weir