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exchange; conversion; replacement; switching (to); switchover
システムの切替え作業は深夜に実施される。
The system switchover will be carried out late at night.
気持ちの切替えが早い人は仕事の効率がよい。
People who switch their mindset quickly work more efficiently.
燃料の切替えに伴い設備の改修が必要になった。
Equipment renovation became necessary with the fuel switchover.