| 摘要 |
A positioning device configured to position a first and a second movable object in a substantially common operation area is presented. The positioning device includes a first coil assembly arranged next to the operation area, a second coil assembly arranged at an opposite side of the operation area, one or more first magnets arranged on the first movable object and configured to cooperate with the first coil assembly, and one or more second magnets arranged on the second movable object and configured to cooperate with the second coil assembly.
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