- dock gate (or caisson)
- dockgateorcaisson
- entrance caisson
- floodgate
- 坞: a depressed place; cove; rec ...
- 门: entrance; exit; door; gate
- 沉箱,坞门: caisson
- 浮坞门: cai ongate; dock pontoon; dry-dock caisson; floating gate; gate caisson; ship caisson; ship gate; ship-shape caisson gate
- 尾坞门: stern gate
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