driving cage gen.

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Здравствуйте, все!

Помогите, пожалуйста, перевести термин driving cage bar

Контекст: "...a spiral conveyor belt system was disclosed wherein an edge member or side plate includes one or more generally vertical grooves formed in its outer side. These vertical grooves were positioned to engage with protruding structure of cage bars of a spiral conveyor driving cage."

Заранее благодарю