double switch meaning in Chinese

两路开关
双刀开关

Double switching power supply , be capable of automatic power switching
双开关电源，具备电源自动切换功能
All - optical switch with double switched ports based on semiconductor optical amplifier
基于半导体光放大器的双端口全光光开关
Sheng zhuan ? cheng , li guang ? yong , he huai ? qian . a new soft switching topology for double switching forward converter j . power electronics , 2001 , 35 ( 3 ) ： 4346
周平森，王慧贞.一种双管正激变换器的初级箝位电路j .电力电子技术, 2003 , 37 ( 5 ) ： 4749