短語(yǔ)詞組短語(yǔ)Mechanical optical switching device 發(fā)明名稱(chēng)fixed trip mechanical switching device 固體脫扣器機(jī)械開(kāi)關(guān)電器trip free mechanical switching device 自由釋放機(jī)械式開(kāi)關(guān) 返回 mechanical switching device