1、周期换向
... 不溶性阳极insoluble anode 周期换向periodic reversal 脉冲电解pulse electrolysis ...
2、周期性反转
... perform onstage 登台表演 periodic reversal 周期性反转 persist in 坚持作...
periodic flow reversal流向变换
periodic flow reversal reactors流向变换反应器
periodic current reversal周期反向电流
periodic reversal permanent focusing周期反转永磁聚焦
periodic reversal currentelectrorefining of copper铜周期反向电解