短語詞組短語press to talk switch 按鍵通話開關(guān)pendnext to pull switch 拉線開關(guān)back to back switch 主從背對背開關(guān)connecting to the switch 連接到交換機Switch to -switch 節(jié)點到節(jié)點push to break switch 雙位壓動式轉(zhuǎn)換開關(guān)push to talk switch 按鈕操縱的傳話開關(guān);壓簧通話開關(guān)open to the switch 消息來看switch -to- 機對交換機;節(jié)點到節(jié)點 返回 to switch