必须在给定的运行期结束时更换下列部件的翻译：If must be run in a given period, the following parts 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

The following components must be replaced at the end of a given run-

If must be run in a given period, the following parts

Must in when the movement time conclusion which assigns replaces the following part

Must be given at the end of the run-time replacement of the following parts

If must be run in a given period, the following parts