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