常見例句common-battery telephone switchboad 共電制電話交換機switchboad metal-clad switchboad 鎧裝配電盤private branch exchange switchboad 小交換機central battery local switchboad 共電式市內(nèi)交換機wired logic coutrolled switchboad 布控交換機traffic control telephone main switchboad 調(diào)度電話總機 返回 switchboad