| 摘要 |
A device for relative movement of two elements comprises two link arrangements coupled in series using a connection arrangement. A first link arrangement comprises at least three links which are substantially equal in length and parallel. The links are positioned in a substantially triangular relation viewed along the longitudinal direction of the links, between the connection arrangement and a second of the elements. A second link arrangement comprises at least one parallelogram acting between the connection arrangement and a first of the elements. First and second force applying arrangements are adapted to cause the first link arrangement to pivot. A third force applying arrangement is adapted to cause the second link arrangement to pivot.
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