noun
General term for replacing one thing with another, often used for physical items, documents, or components.
電池の差し替えをお願いします。
Please replace the batteries.
書類の差し替えが必要です。
The documents need to be replaced.
noun
correcting; revision (printing)
Printing term for replacing or correcting a plate, block, or digital file to fix errors.
印刷前に誤字の差し替えを行った。
We corrected the typo before printing.
Compound of 差し (continuative form of 差す, 'to insert') + 替え (continuative form of 替える, 'to replace'). Literally 'insert-replace'.