[機] 彈簧靜止式機械密封 spring standing mechanical seal: 彈簧靜止式機械密封-code for test of machanical seal: 壞密封試驗方法machanical: 機械的,呆板的seal spring: 密封彈簧finger spring seal: 指狀彈簧油封下載手機詞典可隨時隨地查詞查翻譯