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document
Evers, H. (author)
Rollator for helping disabled or elderly person walk, has steerable front wheels designed to be turned together The front wheels are designed to be turned together. The front wheels are connected to a steering and adopt different positions according to the Ackermann effect when rotated relative to the rollator length axis as they are turned. An...
patent 2006
document
Evers, F. (author)
Uitgave in opdracht van het Netwerk voor Onderzoek & Ontwikkeling Ruimtelijk Beleid (Netwerk RO).
book 1996