| 摘要 |
In a radiation apparatus an element, which is carried by a balanced suspension system, is to be positioned relative to an object. The element and a counterweight are carried by a parallelogram suspension system in order to increase the adjusting accuracy and the freedom of movement. In order to obtain a smooth, static movement, even during rotation of the entire suspension system, the positioning function and the supporting function of one of the pivotal supports are separated, each function being performed by a separate pivot.
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