| 摘要 |
An optical element housing or mounting connector (4), in particular for lens elements (13) in lens systems (12) for semi-conductor-lithography projection printing machines, is provided with electro-permanent magnets (1), the electro-permanent magnets being magnetized by the magnetic field of a coil (5) connected to an activating device (8) in such a way that the housings or mountings (4) are connected to one another by magnetic forces.
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