changeover
US
UK changeover n: (switch: from one system to another)
SC 变更 biàn gēng
TC 變更
TC 變更
SC 转变 biàn gēng ，zhuǎn biàn
TC 轉變
TC 轉變
It takes three weeks to make the assembly line changeover for a new model.
One reason the United States still doesn't use the metric system is that the changeover would cause a lot of confusion.
change over to [sth] vi phrasal: (switch)
SC 对调
SC 对换 duì huàn
I work until midnight for a week and then I change over to the morning shift.