rolling actuator el.

[Allica2001]

Пожалуйста, помогите перевести. rolling actuator и Defect Disc recovery solution technology

Выражение встречается в следующем контексте:I ts rolling actuator technology automatically adjusts the lens angle so that it can read the information stored on the disc, and its Defect Disc recovery solution technology enhances the DVD player’s auto adjustment capability so that clear pictures can be displayed even when the disc is scratched and scarred, ensuring that you never have to worry about the disc’s readability

Заранее спасибо