"齿顶高修正" can be translated into English as "addendum modification" or "correction of addendum height".
In gear terminology, "齿顶高" refers to the height of the addendum (the part of the gear tooth above the pitch circle), and "修正" means modification or correction. Therefore, "齿顶高修正" specifically describes the process of adjusting or modifying the height of the gear's addendum.
"Addendum modification" is a more concise and commonly used term in the field of gear engineering, while "correction of addendum height" provides a more literal translation that clearly conveys the meaning.