短语词组短語retractile drawbridge 拖曳橋locking drawbridge 吊橋鎖定裝置double drawbridge 雙翼仰開橋bobtail drawbridge 截尾仰開橋lever drawbridge 杠杆操縱活動橋Bitan drawbridge 碧潭吊橋old drawbridge 革命年代的吊橋drawbridge coupler 開郃橋耦郃器 返回 drawbridge