English to Russian Tech/Engineering Automation & Robotics injection molding machine

Добрый вечер!
Как можно назвать поле/функцию - Колебание/Встряхивание?

Shake: The ejector moves automatically between front position
and the position of the next to last profile stage of movement
'Ejector backward'. The number of sequences (one
sequence equals a forward and backward movement) per production
cycle can be set in field Shake counter.
Shake backward time
Duration that the ejector is moving backward during shake- movement.
Спасибо! Буду признательна за идеи.