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exchange; conversion; replacement; switching (to); switchover
電力供給の切換えが完了するまで停電が続く。
The power outage will continue until the power supply switchover is complete.
画面の切換えがスムーズで操作性が良い。
The screen transitions are smooth and the usability is good.
新旧システムの切換え時期が近づいている。
The time for switching between the old and new systems is approaching.