自動轉(zhuǎn)換開關(guān) 自動轉(zhuǎn)向機構(gòu) automatic change over: 自動轉(zhuǎn)換automatic change-over damper: 自動變向閘automatic change-over test: 自動轉(zhuǎn)換試驗automatic on-off change-over: 自動切換manual-automatic change-over: 手動自動變換下載手機詞典可隨時隨地查詞查翻譯