短语词组短語sluice -gate lips 泄水牐門下緣waterproof sluice -gate 防水牐門floodgate sluice sluice gate 水門cylindrical sluice gate 圓筒形水牐fuel pit sluice gate 燃料水池牐門water sluice gate 水牐門tidal sluice gate [海洋]擋潮牐 返回 sluice gate