A track roller unit for a vehicle has at least one pivotable subframe, at least one further pivotable subframe, wherein each of the subframes rotatably accommodates at least one land wheel, at least one subframe is pivotably mountable on the vehicle, and at least the further substrate is pivotally mounted on the one subframe.

 
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< Self-propelled working robot having horizontally movable work assembly retracting in different speed based on contact sensor input on the assembly

> Manually operated electrical control and installation scheme for electric hybrid vehicles

> Self-aligning fixed grille
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