基本解释阻塞鏇塞词组短语短語air shut -off cock 空氣截流鏇塞fluid shut -off cock 油液應急關斷開關engine fire shut -off cock 發電機滅火開關fuel emergency shut -off cock 燃料應急關斷開關专业释义交通運輸工程切流鏇塞截止鏇塞