| http://www.w3.org/ns/prov#value | - For this, it has been proposed to form the movable member at least partially by a ferromagnetic element and to apply counter vibrations" to this element, by means of electric coils, i.e. alternating forces of the same frequency as the vibrations to be reduced which are oriented parallel to these vibrations and in the opposite direction U.S. Pat. No. 4,650,170.
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